全部工具

实时统计文本的字数、字符数、句子、段落和行数。

Convert text between 9 case formats — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case.

Create a clean URL slug from a title or phrase.

在普通文本和 Base64 字符串之间双向转换。

Convert any image or file to a Base64 data URL with preview and CSS/HTML usage snippets.

把文本转换为 URL percent encoding，或把编码内容还原为可读文本。

Convert values between common length units.

Calculate current age from a birth date.

格式化、压缩并校验 JSON，快速定位语法错误。

Convert between JSON and YAML using the standard js-yaml library — both directions, configurable indent, safe-by-default.

在 CSV 和 JSON 数组之间双向转换，适合数据整理和接口调试。

Generate TypeScript interfaces from a JSON sample — nested types, arrays, optional keys inferred.

Compare two JSON values structurally — added, removed, changed keys per nested path. Order-insensitive.

在 Unix 时间戳、UTC 时间和本地时间之间快速转换。

在多个城市和时区之间换算时间，适合会议、发布和远程协作。

Decode URL/Base64 payloads, normalize JSON, and inspect timestamps from one debugging workspace.

Generate single or batch UUID v4 values.

生成 SHA、MD5 和 HMAC 摘要，用于校验、签名调试和数据比对。

生成指定长度和字符规则的随机密码。

Remove exact duplicate lines while preserving the first occurrence and original order.

Sort text lines alphabetically with common options.

Trim extra whitespace from text lines.

Replace every match in pasted text with a case-sensitive toggle and instant match count.

Compare two text blocks and see additions, deletions, and changes — switchable between line, word, and character granularity.

Escape HTML entities for safe rendering or decode entities back to text. XSS-aware with attribute-safe mode.

Escape a string for safe embedding in a JSON value, or unescape a JSON-encoded string back to plain text.

Convert text to Unicode escapes and back.

Convert plain text and binary bytes in both directions.

Convert text to hex bytes and decode hex to text.

Convert signed integers between bases 2, 8, 10, 16, 32, and 36 without precision loss.

解码 JWT 的 header 和 payload，查看声明、过期时间和签名结构。

Compose URL query strings from key-value rows — repeated keys for arrays, automatic percent-encoding, live preview.

解析 URL 的协议、主机、路径、哈希和查询参数，并支持参数解码。

Run page launch checks for title, description, canonical, robots, sitemap, and hreflang in one workspace.

Generate robots.txt, sitemap inventory, canonical host rules, and hreflang output in one workspace.

Plan meta title, description, Open Graph, and social card copy together, then hand off one clean tag bundle.

Build, lint, and hand off tracked links with UTM, preserved params, custom rows, and QR preview in one workspace.

把文本或链接生成二维码，并下载 PNG 或 SVG 文件。

为广告、邮件、社媒和内容投放快速生成带 UTM 参数的 campaign URL。

Free Google SERP simulator with pixel-accurate width measurement for desktop and mobile — character counts alone miss the real truncation.

Generate a basic robots.txt file with common block rules and sitemap output.

Clean, trim, and deduplicate page URLs before building a sitemap file.

检查页面 canonical URL 是否规范、可读，并识别常见配置问题。

为多语言页面生成 hreflang 标签和可检查的 URL 映射。

Extract and decode query parameters from a full URL.

Compare two semantic versions.

Calculate elapsed calendar days, decimal weeks, and an approximate month interval between two dates.

Compute percentage and remaining values from part and total.

Simplify a two-part ratio and compare its decimal value and percentage shares.

Generate random integers in a custom range.

Generate placeholder words, sentences, or paragraphs.

Test regular expressions with live match highlighting and capture group table.

Convert colors between Hex, RGB, HSL, and OKLCH with a live swatch and hue slider.

Convert CSS lengths between px, rem, em, %, pt, vw, and vh — configurable root font size and viewport.

Parse CRON expressions, describe them in plain language, and preview the next 10 runs.

Look up HTTP status codes and meanings.

在浏览器中压缩 JPG、PNG 和 WebP 图片，并可限制最大宽度。

Convert JPG, PNG, and WebP images in your browser with quality controls and transparent PNG/WebP handling.

在浏览器中把多个 PDF 合并为一个文件，可调整文件顺序。

Pull specific pages from a PDF into a new file — works on lists and ranges (e.g. 1,3,5-7), runs in your browser.

Split a PDF into individual pages.

选择无损紧凑重存或明确标注的有损栅格模式，并比较真实的处理前后大小。

Rotate all pages of a PDF by 90°, 180°, or 270°.

Rearrange pages in a PDF.

Combine JPG, PNG, or WebP images into a single PDF.

Export every PDF page as a PNG or JPEG image.

Stamp a text watermark on every page of a PDF.

Strip owner-set permission flags (no-print, no-copy, no-edit) from a PDF you can already open. Cannot decrypt user-password-protected files.

从 PDF 中提取可选择文本，适合快速复制、检索和整理内容。

Convert tabular data between CSV, JSON, and Markdown tables in the browser.

Write Markdown and see the rendered HTML update live, then export or print to PDF.

Generate a Markdown table of contents — GitHub / GitLab / plain slugs, configurable depth, auto-dedup.

从示例 JSON 生成 JSON Schema，帮助整理接口、配置和数据校验约束。

Paste a base version plus two edits and see conflicts, one-sided changes, and auto-merge candidates.

Inspect EXIF metadata in your photos and re-export a clean copy without GPS or camera info.

Save a running history of snippets with search, pinning, and one-click copy — stored locally only.

Convert Chinese text between Simplified and Traditional scripts and render Pinyin with tone marks, numbers, or plain.

Check foreground-background color contrast against WCAG 2.1 AA and AAA thresholds for text and UI.

Estimate monthly EMI, total interest, total repayment, and an amortization schedule.

Project compound growth from principal, annual rate, term, and compounding frequency.

Calculate simple interest and ending balance from principal, annual rate, and time.

Calculate discount amount and final price from an original price and percent off.

Add or remove tax and VAT from an amount with a custom percentage rate.

Estimate break-even units and revenue from fixed cost and per-unit contribution margin.

Estimate the monthly contribution needed to reach a savings target by a deadline.

Delete selected pages while preserving the order of every page you keep.

Set page crop boxes with precise top, right, bottom, and left margins.

Number selected PDF pages with configurable position, size, and starting value.

Review and edit PDF title, author, subject, and keyword fields.

Resize, fit, rename, and export a batch of browser-decodable images as one ZIP.

Crop, rotate, flip, resize, preview, and convert one image in a single workspace.

Re-encode a video with an explicit quality preset and measured before/after size.

Convert a browser-readable video to MP4 or WebM with an explicit codec path.

Cut a video to a precise start and end time and create a new encoded clip.

Scale video to a target width while preserving aspect ratio and even codec dimensions.

Remove every audio track while copying compatible video data into a new file.

Turn a short video segment into a scaled animated GIF with explicit frame rate.

Export the primary audio track from a video as MP3 or WAV.

Inspect container, duration, dimensions, rotation, codecs, channels, and sample rate.

Crop a video to a rectangular pixel region and re-encode the visible area.

Join compatible clips in selected order with a fast concat path.

Speed up or slow down video and audio together from 0.5× to 2×.

Rotate video pixels 90° clockwise, 90° counterclockwise, or 180°.

Extract PNG frames at a chosen interval and download them as a ZIP.

Overlay a local image on a video at a selected corner with configurable scale.

Cut an audio file to a selected start and end time.

Convert browser-readable audio to MP3, WAV, or Ogg Vorbis.

Join compatible audio files in selected order without adding a transition.

Change audio tempo from 0.5× to 2× while keeping pitch near the source.