142 formats3,213 conversions, 2,615 fully offline

Convert any file, right in your browser.

Images, video, audio, documents and more — converted on your own device with WebAssembly. Fast, free, and your files never leave this tab.

  • No uploads for in-browser formats
  • Hardware-accelerated
  • No sign-up, no watermarks

Popular conversions

The ones people need most.

Browse all 142 formats

How it works

Three steps. Zero friction.

No accounts, no queues, no email-me-the-download. Just the file you need.

  1. 01

    Drop your files

    Drag files onto the page, paste them, or browse. Add a whole batch and mix formats freely.

  2. 02

    Pick a format

    We only show formats that make sense for each file, with the most popular ones first.

  3. 03

    Download

    Grab each result or everything as a single ZIP. Converted files are ready in seconds.

Why Converterrr

A converter that respects your files — and your time.

Built on the same engines professionals use, running where it's fastest and most private: right on your device.

Private by design

Images, video, audio and most documents are converted right in your browser. Nothing is uploaded, nothing is stored — close the tab and it's gone.

  • Never touches our servers
  • No account needed
  • Saved straight to your device

Seriously fast

Multi-threaded WebAssembly and hardware video encoding via WebCodecs. Most images are done before you can blink.

Cloud for the heavy lifting

Word, PowerPoint, eBooks and archives run in isolated sandboxes with LibreOffice, Calibre and friends — then get deleted automatically.

Batch everything

Drop dozens of files, pick one target for all of them, and download the lot as a single ZIP.

Works on any device

Windows, macOS, Linux, iPhone, Android. Nothing to install, and it remembers nothing you don't want it to.

Offline-ready

Converters are cached after the first run. No signal, no problem.

Pro-grade engines

FFmpeg, libvips, ImageMagick, Pandoc, LibreOffice and Calibre.

Developer API

REST endpoints, presigned uploads and signed webhooks.

Every kind of file

One converter for all of them.

Pick a category to see every format we support and the conversions available for it.

For developers

Every conversion, one API call away.

Create a job with a URL or an upload, and get a webhook when it's done. Same engines, same formats, with clear JSON errors and predictable credits.

  • REST API with bearer API keys
  • Presigned uploads for multi-gigabyte files
  • Signed webhooks with automatic retries
  • Included in every paid plan, from $14/month
Read the docsSee API plans
curl https://www.converterrr.com/api/v1/jobs \
  -H "Authorization: Bearer $CONVERTERRR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": { "url": "https://example.com/report.docx" },
    "output_format": "pdf",
    "webhook_url": "https://your.app/hooks/converterrr"
  }'

FAQ

Questions, answered.

Something else on your mind? Write to support@converterrr.com.

Free, private and in your browser

Ready when your files are.

No sign-up, no watermarks, no waiting in line. Drop a file and get it back in the format you need.

Convert a fileExplore the API
  • Most conversions never leave your device
  • Cloud files deleted automatically
  • No watermarks