在线工具合集

Gross pay, social insurance and housing fund, special additional deductions: cumulative withholding gives net pay plus a month-by-month tax breakdown for 12 months (CSV export), including separate taxation of the annual bonus. Salary is never uploaded.

Annual comprehensive income minus the 60,000 CNY allowance, social insurance and fund, special additional deductions, serious medical costs and donations → the yearly tax due and whether you get a refund or owe more. Income is not uploaded.

What you and your employer pay each month: four employee items plus five employer items, every rate editable and the contribution base clamped to its limits, with an annual total; salary and insurance data never leave the page.

Basic pension plus personal-account pension: an estimate of what you will receive each month after retirement, with an index × years lookup table and the 2025 deferred-retirement age schedule; insurance data is not uploaded.

Under the September 2024 reform: original and new statutory retirement dates, months deferred, the minimum contribution years rising stepwise from 2030 and the flexible early-retirement window. Dates stay on your device.

1.5× on workdays, 2× on rest days (compensatory time off excluded), 3× extra on statutory holidays; the hourly rate is derived from 21.75 days a month, with a warning past 36 hours a month. Salary is not uploaded.

Total service length maps to the 5/10/15-day allowance; starting or leaving mid-year pro-rates it by calendar days, and unused days pay out at 300% of the daily wage. Dates and salary stay local.

Hire and exit dates → years of service N, with N, N+1 and 2N scenarios computed together, including the 3× average-wage cap for high earners and the 12-year ceiling. No data is uploaded.

Six groups of documents that grow automatically across eight scenarios, sorted into what you must keep yourself, what the law requires the employer to provide and what is easily lost and should be fixed now; tick, annotate, export to TXT/Markdown, print, with a check against the one-year arbitration limitation. Progress stays on your device, documents are never uploaded.

The statutory monthly floor (30% of your average wage over the last 12 months, never below local minimum wage), top-ups when the agreed amount is lower, the two-year maximum term and termination rules. Data is not uploaded.

Contract length sets the statutory probation cap (up to 1, 2 or 6 months); checks whether the agreed term is lawful, the 80% wage floor during probation and compensation for overruns. Data is not uploaded.

Base × months, annual bonus and annualised equity → total annual cash and monthly average, with the housing-fund contribution shown separately, an estimate of net pay and a side-by-side comparison of two offers. Salaries are not uploaded.

Paste your résumé text and a local rules engine scores contact details, structure, length, quantified results, strong verbs, timeline and bullet discipline, with a suggestion for each item. The résumé is not uploaded.

Fill in on the left and see the finished page live on the right; print from the browser to an A4 PDF with a real text layer that recruiter systems can parse. Sign in to save it to your own account and get a private share link to send to HR — delete it any time.

Checks the checksum digit, birth date, gender, full age and province, with 15-to-18-digit upgrade and pasting many at once. Numbers are never uploaded.

Days between two dates (with or without the first day), working days, date arithmetic, full age and countdowns, updating as you type.

Monthly schedules for equal instalments and equal principal with an interest comparison, plus how much early repayment saves (shorten the term or cut the payment); the schedule exports to CSV.

Principal, a monthly contribution and a yearly top-up, with compounding monthly, quarterly, half-yearly or yearly; year-by-year detail, total interest and an inflation-adjusted view. Amounts are not uploaded.

BMI (Chinese and WHO bands), basal metabolism and daily calories, blood pressure mmHg to kPa and glucose/lipid unit conversion; estimates only, no diagnosis.

Length, area (including the Chinese mu), mass (including jin and liang), temperature, pressure, data storage and more, all units at once, with storage shown in both decimal and binary interpretations.

Current time and offsets for several cities, conversion of any moment across time zones with daylight saving and half-hour zones handled automatically, plus whether it is working hours there.

Live Beijing time, full-screen as a digital clock wall, with milliseconds and 12/24-hour formats, showing how far your device zone is from Beijing; runs purely locally and makes no network requests at all.

Today’s almanac — do’s and don’ts, clashes, the presiding deity and day, the twenty-eight mansions, lucky directions, Peng Zu’s hundred taboos and the twelve double-hours, plus date selection by activity — with Gregorian/Lunar conversion (leap and long/short months), zodiac and ganzhi years, star signs and a Spring Festival countdown.

Two-way conversion between Unix timestamps (seconds or milliseconds, auto-detected) and dates, showing local, Beijing and UTC together, with one-click copy of the current timestamp.

Convert amounts to Chinese capital-figure numerals (壹贰叁…元角分) and back, and write cheque or invoice dates in the tamper-proof capital form (零壹月, 壹拾贰月…); negatives, trillion-level amounts, zero and the closing 整 all follow the standard. Amounts and dates are not uploaded.

Estimate the due date from the last period, the conception date or the IVF transfer date, with the current gestational age (weeks and days), days pregnant and a table of antenatal check-up milestones. Dates are not uploaded; for reference only.

Random numbers in a range (duplicates optional), list raffles, weighted draws and shuffling; real randomness uses a cryptographically secure source, and supplying a seed reproduces the result exactly. Content is not uploaded.

Enter a birth date to get full age, nominal age, the Chinese zodiac animal, the weekday you were born on, days lived, and how far the next birthday and the next zodiac year are; the reference date is configurable. Birth data is not uploaded.

Enter a birthday to see the star sign (date range, element, personality keywords), all twelve signs on one grid, and pick any two for a deterministic compatibility score with comments. Runs locally, nothing uploaded; for entertainment.

Trigonometry and inverse trigonometry, ln and log, powers and roots, factorials, pi and e, with a degrees/radians switch and full keyboard input. Expressions are not uploaded.

Typing speed in WPM for English and Chinese characters per minute, plus the "Word Attack" (单词来袭) mini-game: words fall, you type them to pop them and build combos, with English and Chinese word lists and locally synthesised sound.

Type an expression in x and see it plotted instantly: several curves in one frame, piecewise functions, shaded feasible regions for inequalities, automatic marking of zeros, extrema and intersections, clean breaks at asymptotes for tan and 1/x, and SVG or PNG export, all computed locally.

Batch-compress JPG/PNG/WebP with an optional maximum edge length, showing the size before and after each file. Compress before sending a résumé, posting in a group or uploading an ID photo.

Type a target size (say 100KB): quality is found by binary search and the resolution is reduced if needed; if the target is unreachable the true minimum is reported instead of pretending.

Drag the crop box freely or lock it to 1:1 / 4:3 / 16:9 / 3:4 / 9:16; rotation and a custom output size are supported.

Batch-convert PNG / JPG / WebP, and even produce SVG (vector tracing or the bitmap embedded); you see the size change and whether the result is really vector.

Text or logo watermarks with nine anchor positions, opacity, rotation and anti-theft tiling; works on batches.

Paint over the watermark and the background is rebuilt from the surrounding pixels, exported at full resolution. No model, no network, the image never leaves the browser.

Prefix plus index, find and replace, append the modified date — reorder freely, duplicate names are detected, and the files are zipped under their new names (a browser cannot rename local files in place).

Join screenshots, receipts or step images into one tall or wide image, with a common width, spacing, background colour and alignment.

Crop to standard ID sizes (one-inch, two-inch, passport), swap the background between white, blue and red in one click, output at 300 DPI and lay the photos out on a 5-inch print sheet.

Place the front and back of an ID or bank card on one A4 page at true size, optionally with a purpose watermark and cut guides; print and trim.

Combine images into a single PDF with your own order, A4 or fit-to-page, margins and orientation. Handy for expense receipts and scanned contracts.

Decode iPhone HEIC/HEIF photos locally into JPG/PNG, batch them into an archive; the files never leave the browser.

Any combination of 90° clockwise/counter-clockwise and horizontal/vertical flips, with EXIF orientation normalised, in batches; images stay in the browser.

Drag to select an area and apply mosaic, blur or a solid block with adjustable strength, with undo and clear; export at the original resolution. Images stay in the browser.

Extract the dominant colours automatically (median cut) with HEX / RGB / HSL and their share, click to copy, copy as CSS variables, plus contrast; images stay in the browser.

Pick many images at once and scale them by width, by height, by fixed box (stretch, pad or crop) or by percentage; export PNG/JPG/WebP in a zip. Images stay in the browser.

Read the camera, lens, capture time, exposure settings and GPS location stored in a JPG, then wipe all metadata in one click or remove just location and device details — no re-encoding, no quality loss; batches zipped. Images stay in the browser.

Cut one image into a 3×3 / 2×2 / 4×4 grid, optionally centred to a square first, preview each tile, download singly or as a zip; cropping only, no re-encoding, images stay in the browser.

Turn an ordered set of images into a GIF, or sample a video clip at a chosen frame rate; maximum edge, fps and loop count adjustable, with a size preview before you download. Files are not uploaded.

Recognise Chinese and English in an image, proofread the result word by word and see the average confidence. Recognition runs locally, images are not uploaded, and the model is fetched only when you first click.

Type a prompt to generate an image (platform cloud model): login required, billed in platform points with auto refund on failure; similar prompts reuse cached images for free. Prompts and images are stored under your account, deletable anytime.

Combine several PDFs into one and reorder them by dragging or with buttons. Nothing is uploaded to any server.

Extract page ranges (like 1-3,5,8-10), or split into one file every N pages and download the bundle.

Lossless restructuring that keeps the text layer, or lossy rasterising for a much smaller file; size, page count and page dimensions compared before and after.

Detect and trim the white margins of scans automatically, or crop given pages by a uniform margin; lossless cropping that barely changes the file size.

Delete unwanted pages, rotate landscape ones, reorder by dragging or buttons, with undo and reset, exported as a new PDF.

Nine anchor positions, four formats (including page 1 of 5), a starting number and skipping the cover, for printing, binding and submitted paperwork.

Write a text or logo watermark onto every page, with anti-theft tiling, opacity and a 45-degree tilt, and optionally only on the pages you list.

Pull the text out of a PDF into copyable text or a txt file, or export the embedded page images as PNG in a bundle (scans have no text layer, so no OCR here).

Fit 2, 4, 6 or 9 pages onto one sheet to save paper when printing; pages are laid out by embedding, so the text layer stays searchable and copyable.

Export every PDF page as PNG / JPG, choosing pages and resolution (1x to 4x), one page at a time or as a zip.

Join the pages into one tall image so a whole document fits in a single WeChat message; the canvas limit is estimated before rendering and, if exceeded, it says exactly how many pages fit.

Convert .docx / .doc to PDF with layout, tables and pictures preserved, then download in one click; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Convert a PDF into an editable .docx, keeping paragraphs and basic formatting; uses the server-side conversion channel — the file is used only for this one conversion and destroyed right after. Scans need OCR first.

Convert .pptx / .ppt to PDF with layout, charts and images preserved, then download in one click; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Convert .xlsx / .xls to PDF paginated by the workbook page setup, then download in one click; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Rotate all pages, only odd or even ones, or the pages you list by 90 degrees clockwise or counter-clockwise in one go, or flip them page by page; fixes the orientation of scans. Files never leave the browser.

Extract the images embedded on each PDF page (photos, scans, logos) with thumbnail previews, download singly or as a zip. Files never leave the browser.

View and edit the title, author, subject, keywords, creator and creation date; the modification date and producer update automatically on save, and the result is a new PDF. Files never leave the browser.

Detect text fields, check boxes, radio buttons and drop-downs in a PDF and build a filling form for them, then export an editable or a flattened PDF; the original file is untouched. Files never leave the browser.

Convert .txt / .rtf to PDF with Chinese fonts properly embedded and no garbled text (UTF-8 and the older GB18030 are detected automatically). This page uploads your file.

Export each page of a Word / PPT / Excel file as PNG / JPG or join them into one tall image, optionally as a zip; the document is first uploaded to be converted to PDF (deleted as soon as that finishes), and the PDF-to-image step runs entirely in your browser.

Turn a .csv / .tsv table into a PDF (A4 portrait, automatic pagination, Chinese intact); the file is used only for this one conversion and deleted as soon as it finishes.

Convert .rtf rich text to PDF, keeping bold, italics, sizes and colours, with Chinese fonts embedded so nothing turns to boxes; the file is used only for this one conversion and deleted as soon as it finishes.

Convert .odt text documents from LibreOffice / OpenOffice to PDF, keeping layout and Chinese fonts; the file is used only for this one conversion and deleted as soon as it finishes.

Extract the tables in a PDF (invoices, reports, statements) into an .xlsx, one worksheet per table, plus a worksheet with the whole text; long numbers are written as text so they do not collapse into scientific notation, and scans are not supported.

Draw a signature by hand or upload a signature image, click to place it on the chosen page and spot, sign several pages at once, with automatic compensation for rotated pages, exported as a new PDF while the original stays untouched; the signature never leaves the browser.

Upload several PDF invoices at once, with multiple invoices per PDF recognised page by page, and pull out the invoice number, issue date, buyer and seller with tax numbers, amounts, tax and total into one ledger Excel (.xlsx); anything it cannot read comes with the reason instead of a wrong number.

Use a password you already know to save an encrypted PDF as a copy that needs none (AES and RC4, all key lengths, text layer preserved); there is no cracking of any kind and the password is never written to logs; the file is used only for this one conversion and deleted as soon as it finishes.

Set an open password and a permissions password on a PDF, restricting copying, modification, printing and more (RC4-128, compatible with all mainstream readers); encryption happens in the browser and the file is not uploaded.

Upgrade .doc to the Word 2007+ .docx format for newer systems and online preview; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Upgrade .ppt (the old 97-2003 format) to PowerPoint 2007+ .pptx, keeping text, images and tables; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Upgrade .xls (the old 97-2003 format) to Excel 2007+ .xlsx, keeping cell values and formulas; this runs through the server-side conversion channel — the file is used only for this one conversion and destroyed right after.

Convert .odt into an editable .docx that Word and WPS open straight away, keeping styles and Chinese text; the file is used only for this one conversion and deleted as soon as it finishes.

Convert an .ods spreadsheet into .xlsx, keeping cell values, formulas and Chinese text, ready to open in Excel or WPS; the file is used only for this one conversion and deleted as soon as it finishes.

Convert an .odp presentation into .pptx, keeping slide text, images and layout so PowerPoint opens it directly; the file is used only for this one conversion and deleted as soon as it finishes.

Turn a .csv / .tsv table into an .xlsx workbook with Chinese intact (UTF-8 and GB18030 detected automatically); the resulting Excel file stays editable. This page uploads your file.

Convert .xlsx / .xls to .csv (UTF-8 with BOM, so a double click in Excel shows no mojibake). Only the first worksheet is exported; the page says so plainly and points to the alternative. This page uploads your file.

Convert .txt / .rtf into an editable .docx with Chinese shown correctly and line breaks kept as paragraphs; the file is used only for this one conversion and deleted as soon as it finishes.

Extract plain text .txt from .docx / .doc / .rtf / .html (UTF-8 with BOM, opens straight in Notepad), handy for pulling the body out of contracts and résumés. This page uploads your file.

Read EPUB / TXT / Markdown right in the browser: chapters come from the book’s own table of contents, Chinese TXT gets GB18030 detected automatically, and font size, line spacing and theme are adjustable. Nothing is uploaded and everything is processed locally; files with DRM are not cracked in any way.

Four kinds of content — text or URL, Wi-Fi, vCard, SMS/tel — with adjustable size and error-correction level, the quiet zone preserved, downloaded as PNG. Content is not uploaded.

Read a code from an image or a pasted screenshot (Ctrl+V), detect its type (URL/Wi-Fi/vCard), mark where it was found and export the result as txt. Images are not uploaded.

Paste lines or import a txt / csv and generate a whole set at once, with size, error correction, quiet zone and colour configurable, named by index or content, singly or as a zip. Content is not uploaded.

Common barcode symbologies — CODE128 / CODE39 / EAN-13 / UPC-A / ITF-14 — with adjustable width, height, font size, colour and margins; download PNG / SVG or a batch zip. Content is not uploaded.

Read a barcode from an image, a screenshot or the camera (1D codes such as CODE128, CODE39, EAN-13, UPC-A, ITF). Images are not uploaded and the decoding library is self-hosted.

Put your brand logo in the middle of the code with size, padding, corner radius and colour adjustable; the highest error-correction level is the default, and after generating you can check in one click whether it still scans. Content is not uploaded.

Literal or regex modes, case sensitivity, whole-word matching and replace-all, with live match counts, highlighting and $1 group back-references. Text is processed locally and not uploaded.

Compare two texts at line and word level, side-by-side or inline, to spot differences in contracts, code and config files.

Characters, Chinese characters, words, lines, paragraphs, reading time and the top 10 characters and words, counted live, with duplicate-line detection.

Deduplicate, strip blank lines and surrounding whitespace, natural sort (numeric and pinyin order) and reverse, run as a fixed pipeline with instant output. Text stays in the browser.

Nine styles converted both ways: UPPER, lower, Title Case, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. Text stays in the browser.

Mask phone numbers, ID numbers, bank cards, e-mail addresses and names in one click, with the rules shown and custom regex supported. Text stays in the browser.

Split text into blocks by character count, line count or a regex separator, numbered, with a full preview or a bundle of .txt files to download. Text stays in the browser.

A GBK / GB18030 / Big5 file opens as gibberish? Decode it to UTF-8 with the original encoding detected or chosen by hand, and fix pasted mojibake like "好活" too. Files stay in the browser.

One-click conversion between full-width and half-width letters, digits and punctuation, with Chinese and Western punctuation controlled separately, per-category checkboxes for digits, letters, punctuation and spaces, and a live count of characters changed. Text is not uploaded.

Two-way conversion between simplified and traditional characters, covering mainland simplified, Taiwan standard and Hong Kong traditional, with a choice of glyph-only conversion or also switching Taiwan vocabulary (软件 → 軟體); custom replacement lists supported. Text is not uploaded.

Convert characters to pinyin with tone marks (zhōng), numeric tones, no tones or just initials; polyphonic characters are resolved by phrase, custom readings can be added and the mapping exported. The dictionary runs locally and the text is not uploaded.

For each character, the stroke count, each stroke name and shape and the number of turns — a whole passage in one go, copyable or exportable as a CSV reference table. The stroke-order database runs in the browser and nothing is uploaded.

MD5 / SHA-1 / SHA-256 / SHA-512 and HMAC, supporting text and file hashes (files are not uploaded).

Password-based key derivation (PBKDF2) plus AES-GCM/CBC symmetric encryption; the salt and iv are copyable and any tampering is detected.

Base64 (standard and URL-safe), URL, HTML entities, Unicode escapes, Hex, and JWT decoding.

Format, minify, validate (with the exact row and column of an error), sort keys, escape, and convert to CSV.

Convert CSV tables to JSON data and back, handling fields with quotes, commas and newlines safely; the downloaded CSV carries a BOM so Excel shows no mojibake. Text never leaves the browser.

Rich text editing with live Markdown preview, Markdown to HTML and back, plus file export.

Live match highlighting, capture groups and error positioning, with a library of common patterns; text is processed locally and not uploaded.

Two-way conversion between HEX / RGB / HSL (including alpha): fill any one and the other two follow, with WCAG contrast AA/AAA checks.

Cryptographically secure batch UUID v4 generation (up to 500) plus name-based v5 (the same name always yields the same value, RFC 4122), with optional upper case, no hyphens, braces and prefixes; results never leave the browser.

Standard 5-field and Quartz 6-7-field expressions (seconds, ?, L, W, #), with an explanation in Chinese, a field-by-field breakdown and the next 10 run times; the computation never leaves the browser.

Batch generation of strong passwords with a CSPRNG, choosing length and character sets, excluding confusable characters, with an entropy-based strength estimate; results never leave the browser.

CIDR to and from network address / broadcast address / host count, subnet mask conversion, which subnet an IP belongs to (longest prefix match) and splitting a subnet by 2^k; the computation never leaves the browser.

See your current public IP and its approximate location (IPv4/IPv6), then copy it in one click; the IP is only echoed for this request, never used for profiling, and no files are uploaded.

Parse query parameters into a table, sort, add and remove them, rebuild the URL and output cURL, JavaScript and Python calls; nothing leaves the browser.

Randomly generate fake names, phone numbers, emails, national ID and bank card numbers and more, all with valid check digits; choose the row count and a seed for reproducibility, and export to CSV; nothing leaves the browser.

Export one icon as nine PNG sizes from 16 to 512 (favicon, app icons, PWA), previewing each size and downloading singly or as a zip; images are not uploaded.

Paste JSON and infer the types automatically, generating entity classes for Java (Lombok / Jackson), TypeScript, Python, Go, C# and PHP, with nested objects and arrays split out on their own and illegal identifiers kept as they are; data is not uploaded.

Convert between any bases from 2 to 36 with exact BigInt arithmetic that loses no precision, supporting negatives, 0x/0b/0o prefixes and fractions (marked exact or recurring), plus grouped binary views of 8/16/32/64 bits; nothing is uploaded.

Encode a file to Base64 or a data URI (copy it or save it as a .txt), and decode Base64 or a data URI back into a file, with automatic image previews plus the original size and the inflation ratio; files never leave the browser.

YAML to JSON, JSON to YAML and YAML to Properties, supporting multi-document files, anchors and aliases with errors reported by row and column, and optional indentation, key sorting and line width; configuration content never leaves the browser.

Beautify a single statement or a whole script, with dialects including MySQL, PostgreSQL, SQL Server, Oracle, SQLite and BigQuery and configurable keyword case and indentation; SQL is not uploaded.

Format and beautify, check well-formedness with errors by row and column, and convert XML to JSON and back; the handling of attributes, empty elements and repeated sibling names is transparent and predictable, and the content is not uploaded.

Browse the file tree of an archive, download a single file or repack it, and compress many files or folders into one ZIP in a click, with double guards against zip-slip and zip bombs and automatic recognition of GBK filenames that look like mojibake; files are not uploaded.

Paste CSV or TSV and get a line, bar, pie or scatter chart in a moment, with multiple series split into columns automatically and non-numeric cells left blank while naming the row and column; export PNG or SVG and copy the ECharts configuration; data is not uploaded.

Generate a key pair in one click at 2048, 3072 or 4096 bits, as an SPKI public key plus a PKCS#8 private key in PEM, with JWK and a modulus fingerprint; the private key stays in browser memory only, never uploaded and never written to disk.

Send an HTTP request and inspect the response body, status code and elapsed time, with custom headers and a JSON body and one-click copying of curl; requests are relayed by the server (public addresses only) and nothing is kept or logged after relaying.

Sign a token with HS256 (with quick filling of exp), decode the three-part structure and the exp/nbf/iat validity status, and verify a signature with the same key; tokens and keys never leave the browser.

Turn one source image into the whole install asset set: icons in every size (with a maskable safe area), favicon.ico, manifest.webmanifest, iOS splash screens per device and a link snippet to paste straight in, packed into a zip in a click; devices are deduplicated by media query and everything is generated locally without uploads.