MConverter
FreeConvert between 500+ file formats in your browser. Documents, images, audio, video, ebooks — fast client-side conversion that doesn't upload your files to a server.
How to install MConverter as a PWA
Frequently asked questions about MConverter
What makes MConverter different from CloudConvert or Zamzar?
CloudConvert and Zamzar are server-side: your files upload to their cloud, get converted, and come back. They support more obscure formats but you have to trust the operator with your file content. MConverter does the conversion in your browser via WebAssembly (FFmpeg.wasm, ImageMagick.wasm, etc.), so files never leave your device. The trade-off is that some heavy conversions (large videos, complex DOCX) are slower in-browser and the WebAssembly bundle is several MB to download once. For privacy-sensitive files MConverter is meaningfully better.
Is MConverter free?
Yes — MConverter has a free tier with no signup that handles up to 5 files at a time, 50MB per file. The Pro tier is $14.99/month and unlocks 500-file batches, 1GB per file, and priority WebAssembly worker threads (faster conversion). There is no ads-supported tier. The pricing positions MConverter against CloudConvert ($8/month for 200 conversion minutes) — Pro is more expensive but uses your own CPU rather than billed cloud minutes, which can be cheaper for heavy users with modern machines.
How does MConverter compare to FFmpeg / ImageMagick on the command line?
FFmpeg and ImageMagick on the command line are free, faster (native binaries), more flexible and the canonical tools for power users. MConverter is the GUI for users who do not want to install CLI tools or learn the syntax. It is also the right choice on locked-down corporate machines where you cannot install software. Under the hood MConverter is literally running compiled-to-WebAssembly versions of those same tools, so the conversion quality is identical for supported parameters.
Can MConverter really work offline?
Yes. After your first visit the PWA caches the WebAssembly modules for the formats you use (typically 5-30MB per converter). Subsequent conversions work fully offline — your CPU does the work, no network needed. The free tier's 5-file limit and 50MB cap apply offline too. This is the reason MConverter loads slower than CloudConvert on first visit (downloading the WASM bundle) but feels faster afterward (no upload round-trip).
Who uses MConverter in production?
MConverter is most popular with journalists, lawyers and consultants who handle confidential documents and refuse to upload to third-party converters. It is also used by developers and content creators who need batch image / video conversion without leaving the browser. EU users prefer it for GDPR reasons (the company is EU-based, hosted in the EU, and the no-upload architecture sidesteps data-transfer concerns entirely). Adoption is highest in privacy-conscious segments rather than mainstream.
Where MConverter is heading (12-24 months)
- →On-device OCR via Tesseract.wasm would unlock the scanned-PDF-to-text market dominated by Adobe and ABBYY.
- →Tighter integration with browser file system access API would let users batch-convert entire local folders in place.
- →GPU-accelerated WebGPU video transcoding (vs CPU-only FFmpeg.wasm) is the largest pending performance win.
Related questions
ChatGPT, Perplexity and Gemini usually suggest these next.
- What file formats does MConverter actually support?
- How fast is browser-based FFmpeg compared to native?
- Can MConverter convert PDF to editable Word?
- Does MConverter support OCR for scanned documents?
- Is the source code open?
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