✨ Chaos Lab Boîte à Outils

Merge multiple PDF files in sequence, all processed locally in browser

versImage转comme PDF，personnalisableÉchelle、pages面Size和pages边距

Render PDF pages as high-res PNG images, local processing

Extract PDF pages by range, or split every N pages into separate files

Add text watermarks to PDF with Chinese support, tile/center, opacity

Rotate or delete PDF pages and export, processed locally

Swap ID photo backgrounds: blue/white/red/transparent with tolerance

Crop to standard ID photo sizes with 6-inch print layout generation

Generate QR codes from text or URLs with adjustable size

Compress JPG/PNG/WebP locally, adjustable quality and max width

Convert image to Base64 Data URL for inline embedding

commeImageAdd文字水印，SupportsTile/定people、Opacity、Pivoter、局部处理

PNG / JPEG / WebP Format互转，conversion par lots，Alldans le navigateur, localement

TéléverserouCollerCode QRImageExtraireContenu（链接/文字），Local识别None需Téléverser

多次Compresser + CouleurFilter + 噪点，一键让Image变得搞rire

versImageConvertircomme经典8peoplepxStyle，réglable整Resolution和Color count量

Resize images with locked ratio, export as PNG or JPEG

versImage切割comme3×3/4×4/5×5网格，一键Télécharger所有切片

Extraire GIF 动图的Every一frames并Exportercomme PNG，LocalDécoderNone需Téléverser

12种一键PresetFilter：黑blanc、经典、电影、冷色、Invertetc.，局部处理

读取PhotoyuanData：相机Parameters、Date taken、GPS people置，LocalAnalyserNone需Téléverser

Pick color from any image position, get HEX/RGB values and palette

Convert between HEX/RGB/HSL colors with live preview sliders

Supports CODE128、EAN13、UPC etc. 20 多种Code-barresFormat，可Download PNG

vers多imgImage横向ou纵向Fusionnercomme长图，调整Spacing和Background色

vers文字隐藏在Imagepx（LSB）中，SupportsMot de passe，肉眼不可见

Generate placeholder images with custom size, color and text

Explore classic Chinese traditional colors with HEX, RGB, CMYK values

36 curated CSS gradients, one-click copy, great for web and poster design

Visual multi-layer CSS gradient editor with live preview and random inspiration

Color harmony generator based on complementary, triadic, analogous schemes

Explore Japanese traditional Washoku colors with HEX, RGB, CMYK values

Check text/background color contrast against WCAG accessibility standards

MP3/AAC/FLAC/WAV/OGG/M4A conversion via FFmpeg command generator with tutorial

Trim audio clips locally with fade in/out, export as WAV

Text-to-speech with adjustable speed and pitch for reading aloud

Adjust audio volume and export, supports extracting audio from video

Record microphone audio locally, requires mic permission

Merge multiple audio files in sequence with configurable gap, export WAV

Format convert, remux, mute, rotate, flip, reverse, speed change, watermark via FFmpeg

Compress video to target size with auto-calculated bitrate via FFmpeg

Generate high-quality GIF from video using 2-pass palette method via FFmpeg

Play video and capture any frame as HD PNG locally

Record screen/window/tab with optional system audio, saved locally

View video duration, resolution, size, format info locally

Aggregate trending topics from Weibo, Zhihu, Bilibili, Douyin, Baidu

Generate 12+ chart types online and export as HD PNG

Extract ZIP files locally and download individually; see notes for RAR/7Z

Package multiple files into ZIP archive locally in browser

4 methods to convert Office docs to PDF: Office, WPS, LibreOffice CLI

Master format conversion guide for documents, images, audio, video, archives, ebooks

Batch extract all images from Office documents locally

Fix garbled text files by auto-detecting GBK/Big5/UTF-8 encoding

EPUB/MOBI/AZW3/PDF/TXT conversion via Calibre with install tutorial

Convertir SRT、VTT、ASS 字幕Format，自动Adjust timeline，traitement local

Shift SRT subtitle timing forward or backward to sync with video

Count characters, words, lines, paragraphs & UTF-8 bytes

Convert text to bold, italic, script, gothic, circled and other fancy Unicode fonts

Live Markdown preview supporting headings, lists, code blocks, and quotes

Remove duplicate lines with options for case, blank lines, and order

Convert to upper/lower/capitalized/sentence case or swap

Diff two text blocks line by line, red for removed, green for added

Line operations: sort, reverse, number, shuffle, deduplicate, extract columns

Extract all email addresses from text with auto-deduplication

Extract Chinese mobile numbers from text, supports +86 prefix

Hide encrypted info in text using zero-width characters with password protection

Generate Chinese or English Lorem Ipsum text for layout testing

Extract HTTP/HTTPS URLs from text with auto-deduplication

Add line numbers with customizable format and start value

Convert to superscript/subscript for chemistry, math, fancy nicknames

Reverse text by characters, words, lines, or per line

Convert units across 7 categories: length, weight, temperature, area, volume, speed, data

房贷Equal payment / Equal principal两种还款方式对比，months供利息一目了然

Real-time exchange rates for 30+ currencies from ECB and open APIs

Calculer身体Qualité指数，给出中国Standard体重Catégories与健康体重范围

Supports四则运算、括号、百Point-virgule的网pagesCalculer器，可用键盘Opération

精确Calculerweeksyears old（yearsmonths日）、距下一uniqueAnniversairedays数、Zodiac与Chinese Zodiac

求百min比、占比、增长率三类常用百min比Calculer，Entrée即出Résultat

二、八、十、十六及 2~36 任意Base互转，基于 BigInt Supports大数

Calculer两unique日期相差days数，ouFrom某日期增减 N days得To新日期

Personnalisé时minsecCountdown，Supports快捷Preset与Fin提醒音

精确To百minsec的Chronomètre，SupportsPause、Tour与min段计时

25 minutes专注 + 5 minutes休息的Standard番茄工作法计时器

同时查看全球十unique主vouloir城市Heure actuelle，Secondesactualisation en direct

parmonths浏览Calendar，Height亮今days与weeks末，Supports快速切换months份

CSV table to JSON array with custom delimiters

Number to Chinese RMB (yuan/jiao/fen) or plain Chinese digits

JSON array转 CSV 表格，自动Extraire所有字段并处理引号转义

Markdown to HTML with source and preview views

Convert between camelCase, PascalCase, snake_case, kebab-case etc.

Convert between fullwidth and halfwidth characters

Mot de passe学安全随机Mot de passeGénérer，PersonnaliséLength与Caractère集，显示强度熵值

Compute MD5 hash online, supports 32-bit upper/lower and 16-bit formats

检测Mot de passe强度、熵值与暴力破解耗时，给出改进建议（analysé localement, rien n'est envoyé）

calcul en ligneTexte的 SHA-1 / SHA-256 / SHA-384 / SHA-512 与 CRC32

Online AES 对称加密与Decrypt，Supports CBC 和 ECB 模式

指定范围内Générer随机整数，Supports去重、排序与批量Générer

Texte与Morse Code互译，Supports字母数字与常用标点

Validate Chinese ID card and query province, birthday, age, gender, zodiac

Look up retirement age under gradual delayed retirement policy by birth date

Local todo manager with completion tracking, filters, and localStorage

Random cuisine picker to solve food indecision, supports re-pick

Random witty poison chicken soup quotes, copy and share

Tap for merit +1 with sound effect and floating animation, saved locally

转盘，快速做出随机二选一决定，Sélectionner困难症救星

Predict possible and impossible child blood types from parents (with Rh)

Predict child hereditary target height calculated separately for boys/girls

Visualize 80 years as 4000 grid cells to feel time passing

Measure reaction time over 5 rounds with best and average stats

Common emoji collection, click to copy, browse by category

Scrolling teleprompter for video recording with speed, fullscreen, mirror

1-minute Chinese typing speed test with real-time WPM and accuracy

Real-time keyboard tester for key response, ghosting, and n-key rollover

Random name picker with multi-draw and removal, great for classrooms

Dead pixel, backlight bleed, grayscale, and solid color screen test

Generate random Chinese male/female names for novels, tests, placeholders

Roll up to 6 dice with animation and total score

Prevent screen sleep for recipes, navigation, livestreams

Chinese dynasties timeline from Xia to Republic of China

Calculate baby's 100th day: date, weekday, and countdown

Online sketchpad with custom brush, eraser, and PNG export

Calculate expiry date and remaining shelf life for food and cosmetics

Quick scoreboard for sports/games with large display, side swap, reset

Flip a coin with flip animation and heads/tails statistics

Validate, pretty-print or minify JSON with error line:col reporting

Convert Unix timestamps to dates, auto-detect seconds/milliseconds

Convert text to/from Base64, handles Unicode correctly, URL-safe mode

URL encode/decode supporting both component and full URI modes

Online regex tester with group highlighting and match details

Batch generate UUID v4 unique IDs using cryptographic random

Chinois与 Unicode 转义序列互转，处理配置Fichier中的转义Caractère

Decode JWT tokens to view header, payload, signature, and expiry

Texte与十六Base（UTF-8 字节）互转

Batch find/replace with regex, supports capture groups and all flags

Encode/decode HTML entities to prevent tag parsing

Quick reference table of common HTTP status codes with search

Remove comments and excess whitespace from JS/CSS/HTML

Visual email signature builder generating HTML for major email clients

Analyze keyword density for English words and Chinese bigrams for SEO

Parse URL into protocol, domain, path, query params, fragment with auto-decode

Visual robots.txt generator with one-click allow/disallow all

Generate SEO meta tags: title, description, keywords, and Open Graph

Parse User-Agent to identify browser, OS, engine, and device info