About GIF Converter
GIF Converter is a free, privacy-first image and video conversion tool that runs entirely in your browser. No file uploads. No accounts. No cost. Your files never leave your device.
Why We Built This
Most online conversion tools require you to upload your files to a remote server. That means your screen recordings, iPhone photos, internal product demos, and personal videos pass through infrastructure you do not control — stored, potentially logged, and sometimes retained long after the conversion is done.
This is a solved problem. Modern browsers can run full-featured software locally thanks to WebAssembly. There is no technical reason a GIF compressor or video converter needs to touch a server. We built GIF Converter to prove that point — and to give developers, designers, and everyday users a tool they can actually trust with sensitive files.
The tool exists because we personally needed it. Screen recordings of internal dashboards, bug reports with credentials visible in the corner, product demos from unreleased features — the exact content you would never want to send to a third-party server. We wanted a fast converter we could use without thinking twice.
How It Works
GIF Converter uses FFmpeg compiled to WebAssembly (WASM) — the same FFmpeg binary that video professionals and developers use on the command line, running directly inside your browser tab.
FFmpeg is a complete, cross-platform solution for recording, converting, and streaming audio and video. It has been in active development since 2000 and is the de facto standard for media processing across the industry. The Emscripten compiler toolchain makes it possible to compile FFmpeg's C codebase to WebAssembly, which browsers can execute at near-native speed.
When you drop a file into the editor and click Convert, here is what happens:
- 1
File read
Your file is read from local storage into browser memory using the FileReader API. Nothing is sent over the network.
- 2
FFmpeg init
If this is your first conversion, FFmpeg WASM is loaded from your local server cache (about 30 MB). This takes a few seconds once; subsequent conversions are instant.
- 3
Processing
FFmpeg runs in a Web Worker thread so your browser tab stays responsive. Frame rate, scale, and encoding parameters are applied as configured.
- 4
Output
The processed GIF is written to browser memory and a preview is shown. You download it directly from memory — no server round-trip.
Our Commitment
Free Forever
No freemium tier, no conversion limits, no watermarks. The tool is and will remain completely free. We believe basic media processing tools should be a public utility, not a subscription service.
Privacy by Architecture
We did not add a privacy feature — we built a tool that is private by design. There is no server to send data to. No database to store it in. No way to collect it even if we wanted to.
No Dark Patterns
No fake progress bars designed to make you think work is happening on a server. No email capture before your download. No countdown timers. Just a tool that does what it says.
Technology Stack
The site is built with Astro for static site generation, Tailwind CSS v4 for styling, and FFmpeg WASM 0.12 for all media processing. The FFmpeg WASM core is served from the same origin as the site — no CDN dependencies, no third-party JavaScript at runtime.
The editor page requires Cross-Origin Isolation (COEP + COOP headers) to enable SharedArrayBuffer, which FFmpeg WASM needs for multi-threaded processing. These headers are set both in the server configuration and in the Vite dev server so the tool works identically in development and production.
No JavaScript frameworks are used on the landing pages. They are fully static HTML + CSS, which means they load instantly, score well on Core Web Vitals, and work without JavaScript enabled.
Ready to Try It?
Open the editor and convert your first file. Takes about 30 seconds start to finish.
Open the Editor