OmniConvert is a free, privacy-first online converter that runs entirely in your browser.

Features

• File Conversion: Images (JPG, PNG, WebP, HEIC, SVG, GIF, BMP, TIFF, ICO), Documents (PDF), Audio (MP3, WAV, OGG, AAC, FLAC), Video (MP4, WebM, AVI, MOV, MKV)
• Unit Conversion: 345+ pairs across 13 categories (length, mass, temperature, speed, data, time, etc.)
• 8 Languages: English, Chinese, Japanese, Spanish, Korean, Portuguese, French, German
• PWA Support: Works offline as a native app
• API & MCP: Machine-readable endpoints for AI agents

Tech Stack

Astro, React, Tailwind CSS, FFmpeg.wasm. Hosted on Cloudflare Pages.

Open source: https://github.com/s87343472/omni-convert