About Multi Tools
Multi Tools is a free collection of online utilities for developers, designers, and anyone who works with code, data, and web content daily. Our service is built on one simple idea: give you fast access to everyday tools without registration, paid APIs, or sending your data to third-party servers. Every tool runs in your browser, making work convenient and as private as possible.
Why local processing matters
When you format JSON, convert an image, or encode text in Base64, the last thing you want is uploading sensitive data to an unknown server. Multi Tools runs entirely on your device using standard web technologies — JavaScript, Canvas API, FileReader, and built-in encoding functions.
This approach is especially valuable for backend developers, DevOps engineers, and security specialists who regularly handle sensitive payloads, tokens, and configuration files.
JSON Formatter — format and validate JSON
JSON has become the de facto standard for data exchange in modern web development. Our JSON Formatter formats, minifies, and validates JSON in seconds with split-screen input and output.
Built-in validation via JSON.parse() instantly shows syntax errors. The Copy button sends results to your clipboard in one click.
Image to WebP — optimize images for the web
Page speed affects SEO, conversion, and user experience. WebP often delivers 25–35% smaller files than JPEG or PNG at similar quality.
Image to WebP converts PNG, JPEG, GIF, and other raster formats in the browser using libwebp (WebAssembly) with lossless and lossy modes, quality control, and instant preview.
CSS Playground — flexbox, grid & animations
Our CSS Playground is an online css playground with three visual builders: a css flexbox generator for one-dimensional layouts, a css grid generator for rows and columns, and a css animation generator that outputs @keyframes. Live preview, copy, and download help you ship styles faster.
Base64 Converter — encode and decode
Base64 is used in Basic Authentication, data URIs, email attachments, and many other scenarios. Our converter supports Encode and Decode modes with Unicode-aware encoding.
Get started now
Pick a tool from the grid above or use the navigation bar. No account, no email confirmation, no heavy app install. Multi Tools is ready for your production workflow today.