File Converters
ConverterFast, private file conversion tools powered by WebAssembly and browser APIs. Transcode videos, convert audio, compress images, extract archives, and convert documents locally without uploading your files.
Last Updated: 1 August 2026
Select a Converter Tool to Get Started
Choose a conversion module above to begin. All video, audio, and image transcoding happens locally in your browser using WebAssembly, your files never leave your device.
Conversion Tips
- 100% Private: Files are processed entirely on your local CPU/GPU and are never uploaded.
- Large video or audio files may take a few moments to initialize WebAssembly engines.
- Do not close or refresh the tab while active batch processing is underway.
- Performance scales directly with your device's available hardware and RAM.
Features
Video Transcoder
Convert MP4, MOV, AVI, and MKV files locally using FFmpeg WebAssembly.
Audio Converter
Extract audio or convert between MP3, WAV, AAC, OGG, and FLAC formats.
Video to GIF
Trim clips and convert video segments into lightweight animated GIFs.
Image Format Converter
Instantly convert PNG, JPG, WebP, AVIF, and BMP images right in your browser.
HEIC to JPG/PNG
Convert iPhone HEIC photos to standard JPG or PNG files with zero quality loss.
Image Compressor
Reduce image file sizes with adjustable quality controls before downloading.
EXIF & Metadata Stripper
Remove sensitive location, camera info, and timestamp metadata from photos.
Vector to Raster
Rasterize SVG vector graphics into high-resolution PNG or JPG images.
Archive Zipper & Unzipper
Compress files into ZIP archives or extract contents without third-party software.
JSON & Data Formatter
Convert between JSON, CSV, YAML, and XML data structures instantly.
Batch Processing
Queue and convert multiple files simultaneously using multi-threaded web workers.
Local Media Export
Preview converted media and download generated outputs directly to your disk.
Frequently Asked Questions
Are my media files uploaded to any external server?
No. All video, audio, and image conversions happen directly in your browser using local CPU/GPU hardware.
Is there any file size limit for video or audio conversions?
Because operations run locally on your device, file size limits are only bound by your computer's RAM and available disk space.
How are video and audio processed in the browser?
We use FFmpeg compiled to WebAssembly (WASM), allowing your browser to execute native media processing code safely.
Does converting images compromise my privacy?
Not at all. Image operations use the native HTML5 Canvas API and WebAssembly decoders completely offline inside your browser.
Can I use these converter tools offline?
Yes. Once the web application loads, all core conversion engines work without an active internet connection.
Is the project open source?
Yes. The source code is publicly available so anyone can inspect, verify, or contribute to the repository.
Open Source
Open Source Project
This tool is open source, privacy-first, and built with the help of the community.
Contributors
Help Improve This Tool
This project is completely open source and built by developers from the community. Whether you've found a bug, have an idea for a new feature, or want to improve the codebase, every contribution is appreciated.
Fork • Star • Contribute