Convert Files Instantly
Privately.
No uploads. No limits. Just pure browser-based power.100% Secure & Offline Capable.
Initializing Core...
Why MixConvert?
Traditional converters upload your files to foreign servers. We don't.
Privacy First Architecture
Your files never leave your device. Unlike other tools that store data on cloud servers, MixConvert processes everything locally in a sandboxed WebAssembly environment. Perfect for sensitive contracts, personal photos, and private data.
Lightning Fast
No upload time. No download queues. Immediate processing using 100% of your device's CPU/GPU power.
Works Offline
Going on a flight? Install as a PWA and convert files anytime, anywhere without an internet connection.
Universal Core
From modern image formats (HEIC, WebP, AVIF) to classic documents (DOCX, PDF) and media (MP4, MP3).One mighty tool for all files.
Popular Conversions
How It Works
Simple. Fast. Private.
Select
Drag & drop your files.
Choose
Pick target format.
Convert
Instant local processing.
Save
Download immediately.
What is MixConvert?
MixConvert is a free, browser-based file converter that processes your files directly on your device — without ever uploading them to a server. Unlike traditional online converters that require you to upload sensitive documents, photos, and media to remote servers, MixConvert leverages WebAssembly (WASM) technology to run powerful conversion engines like FFmpeg right inside your web browser.
This means your files never leave your device during conversion. There is no upload step, no server-side processing, and no risk of your private documents being stored on third-party infrastructure. Whether you're converting a confidential legal contract from PDF to Word, extracting audio from a personal video, or converting iPhone HEIC photos to JPG — your privacy is guaranteed by the architecture itself, not just by a privacy policy.
MixConvert supports 500+ format combinations across audio (MP3, WAV, FLAC, M4A, AAC, OGG), video (MP4, WebM, MOV, AVI, MKV), image (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG), and document (PDF, DOCX, XLSX, PPTX, TXT, CSV) formats. It works on any modern browser, requires no installation, and can even function offline as a Progressive Web App (PWA). Best of all, it's completely free — no watermarks, no file size limits, no daily conversion caps, and no premium tiers.
What Users Say
Real feedback from our community.
Finally a converter that doesn't upload my files. I use it daily for client contracts — knowing no data leaves my laptop is priceless.
I switched from an expensive subscription tool to MixConvert. Same quality, zero cost, and it works offline on flights. Incredible.
Converting HEIC photos from my iPhone to JPG used to be annoying. MixConvert does it instantly — drag, drop, done. Love the simplicity.
Common Questions
Quick answers about MixConvert.
Is MixConvert really free?+
Do my files get uploaded anywhere?+
What formats does MixConvert support?+
Does MixConvert work offline?+
Is there a file size limit?+
What browsers are supported?+
Guides & Resources
Learn more about file conversion, privacy, and getting the best results.