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Process any file without uploading it

PDFs, images, video and audio: compress, convert, merge and edit in your browser. Nothing goes to a server, and it works offline.

Most online file tools upload your file, process it on their server and send it back. That is fine for a meme and less fine for a contract, a passport scan or a family video.

Capy Files runs every tool inside your browser, using WebAssembly builds of open-source engines such as pdf.js, pdf-lib, qpdf, the Squoosh codecs and Mediabunny. Files are read into your device’s memory, processed there, and saved to your downloads. Once the site has loaded, it keeps working with no connection, and it can be installed as an app.

Over 50 tools are free with no account and no watermark. Pro adds the heavier AI features, such as the highest quality background removal.

How it works

  1. Pick a tool below or search for one.
  2. Drop in your files. They stay on your device.
  3. Download the result.

Tools that never upload

Compress PDFPopular

Shrink PDFs to a preset or an exact target size, never bigger than before.

Merge PDFPopular

Combine PDFs in the order you want.

PDF to WordNew

Editable Word document from a PDF. Beta.

Compress imagePopular

MozJPEG, WebP, AVIF & OxiPNG. Target size or quality.

HEIC to JPG

iPhone photos to JPG/PNG that open everywhere.

Remove backgroundProAI

Cut out people, products and pets in one click.

Compress videoPopular

Hardware-accelerated H.264, HEVC and AV1. Hit a target size.

Convert audio

MP3, M4A, Opus, OGG, WAV and FLAC.

See every tool

Why you can trust it

  • No third-party scripts

    Tool pages load code from capyfiles.com only. Your browser blocks everything else.

  • No trackers or ad tags

    Nothing on a tool page reports what you open, and nothing about your files is ever sent.

  • Works with Wi-Fi off

    Once the page has loaded, turn off your connection. The tools keep working.

  • Check it in 30 seconds

    Open the Network tab in developer tools and run a tool. No request carries your file.

Questions

Is it really not uploaded?

Open your browser’s developer tools, go to the Network tab and run the tool. No request carries your file. You can also turn off Wi-Fi after the page has loaded and it keeps working.

Does it work offline?

Yes. After the first visit the app is cached on your device, so you can turn off Wi-Fi and keep using the tools.

Is there a file size limit?

Only your device’s memory. Nothing is uploaded, so there is no server limit to hit.

Is it free?

Over 50 tools are free with no account. Pro is a paid plan for the AI tools at full quality.

Want the details? How Capy Files keeps files on your device