89 formats · 495 working conversions · No account, no watermark

Convert & compress files — free online

Most conversions run right inside your browser, without the file ever leaving your device.

  • FastUsually no upload, no queue
  • PrivateNo account, no sign-in
  • It works with the network offOnce the page has loaded, the converter needs nothing else.

Up to 100 files at once. Mixed formats are fine.

Or pick any file format pair

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  • 423 of 495 conversions run on your own machine.

  • 89 formats

    And the list is read from one registry, so it cannot go stale.

  • No account, no watermark

    Nothing to sign up for and nothing stamped on the result.

  • It works with the network off

    Once the page has loaded, the converter needs nothing else.

How it works

How this file converter works in your browser

Most file converters work the way you would expect: you hand them your file, it travels to a machine you know nothing about, something happens to it there, and a result comes back. The conversion is somebody else's to perform, which means the file is somebody else's to keep. Whether they do is a promise rather than a fact.

Quinvert does the work where the file already is. Browsers grew up: they now run compiled code at close to native speed, which means the same image, audio and document libraries a desktop program would use can run inside a tab instead. So when you drop a file here, the page fetches the one engine your format needs, decodes the file in memory on your own machine, writes the new one, and hands it straight back to you as a download. There is no round trip, because there is nowhere for it to go.

That has consequences beyond privacy. It is faster for anything large, because a 90 MB video is not spending a minute travelling in each direction. It works with no connection at all once the page has loaded. And there is no queue and no daily allowance to spend on the local ones, because there is no server capacity being rationed — 423 of the 495 conversions never touch our infrastructure, so they cost us nothing to run and there is nothing to meter. The free plan still has two limits, and they are stated rather than discovered halfway through: 100 files in one batch, and 100 MB per file — 25 MB where the conversion runs on our server.

The exception is stated rather than buried. About 72 conversions — mainly the Word, Excel and PowerPoint ones — need an office engine no browser can host, and those files are processed on our server and their working directory deleted the moment the result has been read. Every page says which of the two kinds it is before you begin, and the privacy page sets out exactly what that means.

Convert, compress or remove metadata

Convert. 495 format pairs across 89 formats: images, documents, spreadsheets, audio, video, archives, ebooks, data files. Drop a file and the format is identified from its bytes rather than its name, so a mislabelled extension does not defeat it. Each pair has its own page explaining what the conversion actually does to the file, including where it loses something.

Compress. Make a photograph or graphic smaller, either by choosing a quality or by naming a size you have to fit under — the upload form with a 2 MB limit being the usual reason. It encodes at several qualities and keeps the best one that fits. A file that cannot be meaningfully shrunk comes back untouched instead of coming back bigger.

Remove metadata. Photographs remember where they were taken and which camera took them. Documents remember who wrote them and how many times it was revised. Audio and video carry the software that produced them. This shows you what your file is holding, then takes it out — losslessly, without re-encoding, so the picture or the recording is bit-for-bit what it was.

File converter questions

Is Quinvert free?

Yes, and without the usual asterisk. There is no account, no trial, no queue you can pay to skip and no watermark on anything that comes out. A conversion in your browser costs us nothing to run, so there is nothing to meter and nothing capped by the day; the few that need our server are capped at 100 a day per visitor, which is the only counter in the product. The site is paid for by advertising, which is why there is a consent banner and nothing else asking you for money.

Are my files uploaded to a server?

For most conversions, no — 423 of the 495 run entirely inside your browser, and the file never leaves your device. You do not have to take that on trust: open the network tab of your developer tools and watch, or disconnect from the internet and convert anyway. It still works.

Which conversions do use a server, and why?

72 of them do. Those are the ones that need software no browser can run — chiefly the office formats, where faithfully rendering a Word or Excel document means running the same engine a desktop suite uses. Those files are processed and the working directory is deleted as soon as the result has been read. Nothing is stored, and the page tells you which kind of conversion you are about to start before you start it.

Is there a file size limit?

Yes, two, and they are stated above rather than sprung on you halfway through: 100 MB per file for a conversion that runs in your browser, 25 MB for one that runs on our server, and 100 files in a batch either way. Under that ceiling the real constraint is your own memory, which in practice means very large videos are the first thing to struggle — a phone will give up sooner than a laptop. Photographs, documents and audio are almost never a problem.

Do I need to install anything or create an account?

Neither. There is nothing to download, no extension required and no sign-up. The conversion engine arrives as part of the page, and only the one your file needs is fetched — which is why the site loads quickly despite handling a hundred-odd formats.

Does it work offline?

Once the page and the engine for your format have loaded, yes. You can pull the network cable or turn on flight mode and keep converting. This is the clearest demonstration that the file is not going anywhere, and it is a reasonable way to work if you are handling something sensitive.

Will converting make my file worse?

It depends on the pair, and each page says so plainly rather than promising "no quality loss" everywhere. Moving between lossless formats — PNG to WebP lossless, WAV to FLAC — changes nothing at all. Moving into a lossy format discards detail by design. Moving out of one cannot put back what the first encoder threw away, and no tool can.

How many formats are supported?

89 formats, in 495 working combinations — images, documents, spreadsheets, audio, video, archives, ebooks, data and a handful of geographic and calendar formats. A few are deliberately read-only: writing them would require software we cannot license for this, and the list says which rather than failing when you try.

Can I convert or compress several files at once?

Yes. Drop up to 100 files at once, pick a target format and use Convert all — the results come back together as a single ZIP so you are not clicking through ten downloads. That is where the free batch stops, and the archive is assembled in your browser too.

Does it work on a phone?

It does, in any current mobile browser, and the drop zone doubles as a file picker so you can reach your camera roll. Bear in mind the memory limit above: a phone converting a long video is the one case where a desktop is genuinely the better tool.

Can it remove location data and other metadata?

Yes, and that is a separate tool rather than a side effect. A photograph often carries the coordinates it was taken at, the camera serial number and a timestamp; documents carry the author's name and revision history. The metadata remover shows you what a file is holding before it takes anything out, and it never uploads — a tool that removed your location by first sending your location somewhere would be pointless.

What happens to a file that cannot be made smaller?

You get the original back, unchanged, with the reason. Some files are already at their limit and re-encoding them makes them bigger — a compressor that returned a larger file and called it a success would be worse than useless, so this one refuses to.

  • No account, no watermark
  • It works with the network off
  • 89 formats
  • Most files stay on your device