Outils en ligne gratuits qui
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Convertissez, compressez et modifiez des images en quelques secondes. Vos fichiers ne quittent jamais votre appareil — rapide, privé et gratuit. Kaochepai devient une boîte à outils de milliers d’utilitaires.
Tous les outils
Recherchez ou filtrez pour trouver ce dont vous avez besoin. Cliquez sur une carte pour ouvrir l’outil sur son propre sous-domaine.
AVIF vers JPG
Convert modern AVIF images into widely-compatible JPG files instantly, right in your browser.
JPG vers PNG
Turn JPG/JPEG photos into PNG images with lossless quality and optional transparency.
PNG vers WebP
Shrink PNG files into modern WebP format with adjustable quality for faster websites.
Image Compressor
Reduce image file size with a quality slider and see before/after comparison instantly.
Image Resizer
Resize images to exact dimensions or scale by percentage, with optional aspect-ratio lock.
WebP vers PNG
Convert WebP images to PNG format with lossless quality, right in your browser.
PNG vers JPG
Turn PNG images into JPG files with adjustable quality for smaller file sizes.
WebP vers JPG
Convert WebP images to widely-compatible JPG format instantly.
JPG vers WebP
Convert JPG photos to modern WebP format for smaller file sizes and faster websites.
AVIF vers PNG
Convert AVIF images to PNG format with lossless quality and transparency support.
AVIF vers WebP
Convert AVIF images to WebP format with adjustable quality.
BMP vers JPG
Convert uncompressed BMP images to compact JPG format.
BMP vers PNG
Convert BMP images to PNG format with lossless compression.
GIF vers JPG
Extract the first frame of a GIF and convert it to JPG.
GIF vers PNG
Extract the first frame of a GIF and convert it to PNG.
SVG vers JPG
Convert SVG vector graphics to JPG raster images instantly.
SVG vers PNG
Convert SVG vector graphics to PNG raster images with transparency.
SVG vers WebP
Convert SVG vector graphics to WebP format for smaller file sizes.
Image vers Base64
Convert images to Base64 or Data URL strings for embedding in HTML and CSS.
Base64 vers Image
Convert Base64 or Data URL strings back to downloadable image files.
Image Watermark
Add text watermarks to images with adjustable position, size and opacity.
Image Cropper
Crop images to exact dimensions by specifying the crop area.
Image Rotator
Rotate images by 90, 180 or 270 degrees instantly.
Image Grayscale
Convert images to grayscale with adjustable intensity.
Image Flip
Flip images horizontally or vertically in one click.
Image Blur
Apply Gaussian blur to images for a soft, smooth effect.
Image Sharpen
Enhance image edges and details with a sharpening filter.
Image Invert
Invert all colors in an image to create a negative effect.
Image Brightness
Adjust the brightness of images to make them lighter or darker.
Image Contrast
Adjust image contrast to make colors more vivid or muted.
Image Sepia
Apply a warm sepia tone to images for a classic look.
Image Vintage
Add a vintage retro effect to photos with combined filters.
Image Border
Add a customizable border or frame around images.
Image Round Corners
Round the corners of images with adjustable radius.
Image Circle Crop
Crop images into a circle shape for avatars and icons.
HEIC vers PNG
Convert Apple HEIC photos to PNG format.
HEIC vers JPG
Convert HEIC photos to JPG format.
Image vers Favicon
Convert images to favicon format for websites.
Image Thumbnail
Generate small thumbnails from images.
Image Metadata
View image metadata including dimensions and file info.
Image Collage
Combine multiple images into a collage grid.
Image Tile
Split an image into tiles or slices.
Image Optimizer
Optimize images to reduce file size intelligently.
Image vers Sprite
Combine images into a CSS sprite sheet.
Image Color Picker
Pick colors from any pixel in an image.
Text Counter
Count words, characters, sentences and paragraphs in text.
Case Converter
Convert text between uppercase, lowercase, title case and more.
Text Reverser
Reverse text by characters, words or lines.
Text Trimmer
Remove extra spaces, tabs and empty lines from text.
Line Dedup
Remove duplicate lines from text lists.
Text Sorter
Sort text lines alphabetically or by length.
Text Replace
Find and replace text with optional regex support.
Text vers Base64
Encode text to Base64 string format.
Base64 vers Text
Decode Base64 strings back to readable text.
Text vers Binary
Convert text to binary code and vice versa.
Hash Tool
Calculate MD5, SHA-1, SHA-256 and SHA-512 hashes.
URL Encoder
Encode text for safe use in URLs.
URL Decoder
Decode URL-encoded text back to readable form.
HTML Escape
Escape or unescape HTML special characters.
Color vers HEX
Convert RGB color values to HEX format.
Color vers RGB
Convert HEX color values to RGB format.
Color vers HSL
Convert color values to HSL format.
Color Palette
Generate color palettes from a base color.
Color Gradient
Generate smooth color gradients between two colors.
Color Contrast
Check color contrast for WCAG accessibility compliance.
PX vers REM
Convert pixel values to REM units for responsive design.
REM vers PX
Convert REM units back to pixel values.
PX vers VW
Convert pixels to viewport width (VW) units.
VW vers PX
Convert viewport width (VW) units to pixels.
CSS Minifier
Minify CSS code by removing whitespace and comments.
JS Minifier
Minify JavaScript code to reduce file size.
HTML Minifier
Minify HTML markup for faster loading.
JSON Formatter
Format, beautify and validate JSON data.
JSON vers YAML
Convert JSON data to YAML format.
YAML vers JSON
Convert YAML data to JSON format.
BMP vers WebP
Convert BMP images to WebP format for smaller file sizes.
HEIC vers WebP
Convert Apple HEIC photos to WebP format.
GIF vers WebP
Convert GIF first frame to WebP format.
JPG vers BMP
Convert JPG images to uncompressed BMP format.
PNG vers BMP
Convert PNG images to BMP format.
WebP vers BMP
Convert WebP images to BMP format.
AVIF vers BMP
Convert AVIF images to BMP format.
GIF vers BMP
Convert GIF first frame to BMP format.
HEIC vers BMP
Convert HEIC photos to BMP format.
SVG vers BMP
Convert SVG vector graphics to BMP format.
PNG vers ICO
Convert PNG images to ICO favicon format.
JPG vers ICO
Convert JPG images to ICO favicon format.
WebP vers ICO
Convert WebP images to ICO favicon format.
SVG vers ICO
Convert SVG graphics to ICO favicon format.
AVIF vers ICO
Convert AVIF images to ICO favicon format.
Image vers ICO
Convert any image format to ICO favicon.
Image vers SVG
Embed images inside SVG files for self-contained graphics.
Image vers Data URL
Convert images to Data URL strings for inline embedding.
Image vers CSS
Generate CSS background-image code with embedded images.
Image vers HTML
Generate HTML img tags with embedded image data.
Image Pixelate
Pixelate images for privacy.
Image Mosaic
Apply mosaic effect to images.
Image Emboss
Create embossed relief effect.
Image Edge Detection
Detect edges in images.
Image Duotone
Apply duotone color effect.
Image Posterize
Posterize image colors.
Image Threshold
Convert to binary image.
Image Gamma
Adjust gamma correction.
Image Hue
Rotate image hue.
Image Saturate
Adjust color saturation.
Image Night Vision
Simulate night vision effect.
Image Thermal
Apply thermal camera effect.
Image Opacity
Adjust image opacity.
Image Skew
Skew image transformation.
Image Noise
Add noise to images.
Image Vignette
Apply vignette darkening.
Image Scanline
Add CRT scanline effect.
Image Glitch
Create glitch art effect.
Image Halftone
Apply halftone dot pattern.
Image Dither
Apply dithering effect.
ICO vers PNG
Convert ICO to PNG.
ICO vers JPG
Convert ICO to JPG.
BMP vers ICO
Convert BMP to ICO favicon.
HEIC vers ICO
Convert HEIC to ICO favicon.
GIF vers ICO
Convert GIF to ICO favicon.
Word Counter
Count words and characters.
Text vers Bold
Convert text to bold Unicode.
Text vers Italic
Convert text to italic Unicode.
Text vers Strikethrough
Add strikethrough to text.
Text vers Superscript
Convert to superscript text.
Text vers Subscript
Convert to subscript text.
Lorem Ipsum Generator
Generate Lorem Ipsum text.
Password Generator
Generate strong passwords.
UUID Generator
Generate UUID v4.
Random Number Generator
Generate random numbers.
Text Diff Checker
Compare two texts.
Morse Code Translator
Translate Morse code.
Upside Down Text
Flip text upside down.
Bubble Text
Convert to bubble text.
Tiny Text
Convert to tiny text.
Wide Text
Convert to fullwidth text.
Cursive Text
Convert to cursive text.
URL Slug Generator
Generate SEO-friendly slugs.
Braille Translator
Translate text to Braille.
Text vers Hex
Convert text to hex.
CSV vers JSON
Convert CSV to JSON.
JSON vers CSV
Convert JSON to CSV.
XML vers JSON
Convert XML to JSON.
JSON vers XML
Convert JSON to XML.
XML Formatter
Format and beautify XML.
XML Minifier
Minify XML code.
SQL Formatter
Format and beautify SQL.
SQL Minifier
Minify SQL code.
Markdown Preview
Preview Markdown as HTML.
Markdown vers HTML
Convert Markdown to HTML.
HTML Beautifier
Beautify HTML code.
CSS Beautifier
Beautify CSS code.
JS Beautifier
Beautify JavaScript code.
Regex Tester
Test regular expressions.
Base64 vers Hex
Convert Base64 to Hex.
Hex vers Base64
Convert Hex to Base64.
Hex vers Binary
Convert Hex to Binary.
Binary vers Hex
Convert Binary to Hex.
Decimal vers Hex
Convert Decimal to Hex.
Hex vers Decimal
Convert Hex to Decimal.
Color vers Name
Find nearest color name.
Color vers CMYK
Convert color to CMYK.
Color vers LAB
Convert color to LAB.
Color vers LCH
Convert color to LCH.
Complementary Color
Find complementary color.
Triadic Colors
Find triadic colors.
Tetradic Colors
Find tetradic colors.
Color Shades
Generate color shades.
Color Tints
Generate color tints.
Analogous Colors
Find analogous colors.
Celsius vers Fahrenheit
Convert Celsius to Fahrenheit.
Fahrenheit vers Celsius
Convert Fahrenheit to Celsius.
Celsius vers Kelvin
Convert Celsius to Kelvin.
KG vers LB
Convert kg to pounds.
LB vers KG
Convert pounds to kg.
Meters vers Feet
Convert meters to feet.
Feet vers Meters
Convert feet to meters.
KM vers Miles
Convert km to miles.
Miles vers KM
Convert miles to km.
ML vers Liters
Convert ml to liters.
Liters vers ML
Convert liters to ml.
KB vers MB
Convert KB to MB.
MB vers KB
Convert MB to KB.
KB vers GB
Convert KB to GB.
GB vers KB
Convert GB to KB.
Box Shadow Generator
Generate CSS box shadows.
Text Shadow Generator
Generate CSS text shadows.
Gradient Generator
Generate CSS gradients.
Flexbox Generator
Generate CSS flexbox layouts.
Grid Generator
Generate CSS grid layouts.
Border Generator
Generate CSS borders.
Border Image Generator
Generate CSS border images.
CSS Filter Generator
Generate CSS filters.
CSS Transform Generator
Generate CSS transforms.
CSS Animation Generator
Generate CSS animations.
Why Kaochepai?
Every tool on Kaochepai runs fully on your device. Your images are decoded and processed by your browser's Canvas engine — they are never uploaded to a server. That means three things:
- Private. Nothing leaves your computer. Perfect for sensitive or personal photos.
- Fast. No round-trip to a server. Processing starts the moment you drop a file.
- Free. No accounts, no limits, no watermarks. Use it as much as you like.
We are steadily expanding the catalog toward thousands of tools, each on its own clean subdomain for easy bookmarking and sharing.
Are my files uploaded anywhere?
No. All processing happens locally in your browser using the Canvas API. Your files never touch our servers.
Which browsers are supported?
Modern Chrome, Edge, Firefox, Safari and other evergreen browsers. AVIF decoding requires a recent browser version.
Is there a file size limit?
Only your device's memory. Because processing is local, very large images depend on your computer's RAM.
Will more tools be added?
Yes. Kaochepai is growing into a large toolbox. New tools are added regularly, each on its own subdomain.