About OmniConvert

What is OmniConvert?

OmniConvert is a free online tool for file format conversion and unit conversion. Whether you need to convert images (JPG, PNG, WebP, HEIC, AVIF), audio (MP3, WAV, FLAC), video (MP4, WebM), documents (PDF, Markdown), or data files (CSV, Excel, JSON) — plus 345 unit conversions across 13 categories with NIST-level precision — OmniConvert has you covered, all directly in your browser.

Core Principles

• Privacy First — All conversions happen client-side using WebAssembly. Your files never leave your device. Zero server uploads, zero data collection.
• NIST Precision — Unit conversions use factors traceable to the National Institute of Standards and Technology (NIST SP 811).
• 8 Languages — English, 中文, 日本語, Español, 한국어, Português, Français, Deutsch.
• AI-Ready — Full API, OpenAPI spec, MCP integration, and WebMCP support. Built for both humans and AI agents.
• Zero Cost — No registration, no ads paywall. Runs entirely on Cloudflare's free tier.

The Story

OmniConvert was built in 10 days by a non-coder using AI agents — from zero to 3,900+ pages across 8 languages. It's proof that in the AI era, the bottleneck isn't coding ability, but product vision and taste. Read the full story →

Technology

Built with Astro, React, TypeScript, and WebAssembly (FFmpeg.wasm, pdf.js, SheetJS). Hosted on Cloudflare Pages for global edge performance. Progressive Web App with offline support.

For Developers & AI Agents

• OpenAPI Spec — RESTful API for unit conversions
• MCP Integration — Model Context Protocol for AI agents
• llms.txt — Structured info for large language models
• WebMCP — In-browser tool exposure for Chrome 146+ AI agents