Free online tools that
run entirely in your browser
Convert, compress and edit images in seconds. Your files never leave your device — fast, private and free. Kaochepai is growing into a toolbox of thousands of utilities.
All tools
Search or filter to find what you need. Click a card to open the tool on its own subdomain.
AVIF to JPG
Convert modern AVIF images into widely-compatible JPG files instantly, right in your browser.
JPG to PNG
Turn JPG/JPEG photos into PNG images with lossless quality and optional transparency.
PNG to 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 to PNG
Convert WebP images to PNG format with lossless quality, right in your browser.
PNG to JPG
Turn PNG images into JPG files with adjustable quality for smaller file sizes.
WebP to JPG
Convert WebP images to widely-compatible JPG format instantly.
JPG to WebP
Convert JPG photos to modern WebP format for smaller file sizes and faster websites.
AVIF to PNG
Convert AVIF images to PNG format with lossless quality and transparency support.
AVIF to WebP
Convert AVIF images to WebP format with adjustable quality.
BMP to JPG
Convert uncompressed BMP images to compact JPG format.
BMP to PNG
Convert BMP images to PNG format with lossless compression.
GIF to JPG
Extract the first frame of a GIF and convert it to JPG.
GIF to PNG
Extract the first frame of a GIF and convert it to PNG.
SVG to JPG
Convert SVG vector graphics to JPG raster images instantly.
SVG to PNG
Convert SVG vector graphics to PNG raster images with transparency.
SVG to WebP
Convert SVG vector graphics to WebP format for smaller file sizes.
Image to Base64
Convert images to Base64 or Data URL strings for embedding in HTML and CSS.
Base64 to 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 to PNG
Convert Apple HEIC photos to PNG format.
HEIC to JPG
Convert HEIC photos to JPG format.
Image to 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 to 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 to Base64
Encode text to Base64 string format.
Base64 to Text
Decode Base64 strings back to readable text.
Text to 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 to HEX
Convert RGB color values to HEX format.
Color to RGB
Convert HEX color values to RGB format.
Color to 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 to REM
Convert pixel values to REM units for responsive design.
REM to PX
Convert REM units back to pixel values.
PX to VW
Convert pixels to viewport width (VW) units.
VW to 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 to YAML
Convert JSON data to YAML format.
YAML to JSON
Convert YAML data to JSON format.
BMP to WebP
Convert BMP images to WebP format for smaller file sizes.
HEIC to WebP
Convert Apple HEIC photos to WebP format.
GIF to WebP
Convert GIF first frame to WebP format.
JPG to BMP
Convert JPG images to uncompressed BMP format.
PNG to BMP
Convert PNG images to BMP format.
WebP to BMP
Convert WebP images to BMP format.
AVIF to BMP
Convert AVIF images to BMP format.
GIF to BMP
Convert GIF first frame to BMP format.
HEIC to BMP
Convert HEIC photos to BMP format.
SVG to BMP
Convert SVG vector graphics to BMP format.
PNG to ICO
Convert PNG images to ICO favicon format.
JPG to ICO
Convert JPG images to ICO favicon format.
WebP to ICO
Convert WebP images to ICO favicon format.
SVG to ICO
Convert SVG graphics to ICO favicon format.
AVIF to ICO
Convert AVIF images to ICO favicon format.
Image to ICO
Convert any image format to ICO favicon.
Image to SVG
Embed images inside SVG files for self-contained graphics.
Image to Data URL
Convert images to Data URL strings for inline embedding.
Image to CSS
Generate CSS background-image code with embedded images.
Image to 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 to PNG
Convert ICO to PNG.
ICO to JPG
Convert ICO to JPG.
BMP to ICO
Convert BMP to ICO favicon.
HEIC to ICO
Convert HEIC to ICO favicon.
GIF to ICO
Convert GIF to ICO favicon.
Word Counter
Count words and characters.
Text to Bold
Convert text to bold Unicode.
Text to Italic
Convert text to italic Unicode.
Text to Strikethrough
Add strikethrough to text.
Text to Superscript
Convert to superscript text.
Text to 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 to Hex
Convert text to hex.
CSV to JSON
Convert CSV to JSON.
JSON to CSV
Convert JSON to CSV.
XML to JSON
Convert XML to JSON.
JSON to 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 to 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 to Hex
Convert Base64 to Hex.
Hex to Base64
Convert Hex to Base64.
Hex to Binary
Convert Hex to Binary.
Binary to Hex
Convert Binary to Hex.
Decimal to Hex
Convert Decimal to Hex.
Hex to Decimal
Convert Hex to Decimal.
Color to Name
Find nearest color name.
Color to CMYK
Convert color to CMYK.
Color to LAB
Convert color to LAB.
Color to 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 to Fahrenheit
Convert Celsius to Fahrenheit.
Fahrenheit to Celsius
Convert Fahrenheit to Celsius.
Celsius to Kelvin
Convert Celsius to Kelvin.
KG to LB
Convert kg to pounds.
LB to KG
Convert pounds to kg.
Meters to Feet
Convert meters to feet.
Feet to Meters
Convert feet to meters.
KM to Miles
Convert km to miles.
Miles to KM
Convert miles to km.
ML to Liters
Convert ml to liters.
Liters to ML
Convert liters to ml.
KB to MB
Convert KB to MB.
MB to KB
Convert MB to KB.
KB to GB
Convert KB to GB.
GB to 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.