About Transmute

Transmute is a free, open collection of browser-based file conversion and developer tools. Every tool runs entirely on your device using WebAssembly and modern browser APIs — your files are never uploaded to a server.

Why Transmute?

Most online converters require you to upload files to their servers, wait in a queue, and trust them with your data. Transmute takes a different approach: all processing happens locally in your browser tab. That means faster results, no file size queues, and total privacy. There is nothing to sign up for and no data to hand over.

What You Can Do

  • Convert images between HEIC, WebP, PNG, JPG, AVIF, TIFF, and more
  • Compress, resize, and crop images with quality control
  • Merge, split, compress, rotate, and reorder PDF pages
  • Convert and trim audio (MP3, WAV, M4A) and merge tracks
  • Convert video to GIF, trim clips, extract audio, and compress
  • Format JSON, SQL, and XML; encode Base64 and URLs
  • Generate UUIDs, passwords, hashes, QR codes, and lorem ipsum text
  • Build CSS gradients, box shadows, and pick colors

How It Works

Transmute is built with Next.js and TypeScript and exported as a fully static site. Heavy-lifting is handled by WebAssembly engines like FFmpeg.wasm and MuPDF, the Canvas API, Web Audio API, and WebCodecs. Because everything compiles to static HTML, CSS, and JavaScript, there is no backend server — and therefore nothing that can leak your files.

Built By

Transmute is built and maintained by Ishank. If you have feedback or feature requests, feel free to get in touch.