Why this exists
Almost everyone has hit the same wall. A form refuses a photograph because it is four megabytes and the limit is two. An email bounces because the video is too large. A scanned document is rejected by a government portal with no explanation of what would be acceptable instead.
Tools that solve this are easy enough to find, and most of them work. What they also do is ask you to upload a private file to a company you have never heard of, sit through an interstitial advertisement, create an account, accept a watermark, or discover after two files that you have used up your free daily allowance.
That bargain always seemed unnecessary for something as ordinary as making a file smaller. ShrinkFile was built to find out whether the whole job could be done without it.
How it works differently
Conventional file tools send your document to a server, process it there, and send the result back. That approach costs the operator real money in bandwidth and processing for every single file, which is exactly why the limits and sign-up walls exist. They are not arbitrary meanness; they are how the bill gets paid.
Every tool here works the other way round. When you open a page, the processing software is downloaded into your browser, and then it runs on your own computer or phone. Your file is read from your disk, worked on in memory, and handed straight back to you. It is never transmitted anywhere, because there is nowhere for it to be transmitted to.
That single architectural decision explains most of what is different about this site. There is no file size limit, because nothing is being stored. There are no daily caps, because your usage costs nothing to serve. There is no account, because there is nothing to attach one to. And there is no small print about how long uploads are retained, because there are no uploads.
It is not without cost. Processing on a phone is slower than processing in a data centre, and the video tool in particular is genuinely slow, because it is running a full video encoder on your own hardware. That trade seemed worth making.
Something you can verify yourself
Claims about privacy are easy to make and hard to check, so here is one you can test in a few seconds. Open any tool on this site and wait for the page to finish loading. Then disconnect from the internet entirely: turn off Wi-Fi, put the phone in airplane mode, unplug the cable.
Now compress a file. It will work exactly as it did before, because nothing is being sent anywhere. Very few file tools survive that test.
What the tools actually do
The site covers two broad jobs. The first is making files smaller: images down to an exact size limit, PDFs and scanned documents, Word and PowerPoint files with photographs inside them, video, and audio recordings. The second is changing files into a different form: photos merged into a single PDF, PDF pages extracted as images, iPhone HEIC photos converted so they open on Windows, and conversion between the common image formats.
There is also a tool for bundling files into a ZIP, which can split the result into parts small enough to email. That one solves a slightly different problem: not a file that is too large, but too many files to attach at once.
How it is paid for
Advertising, and nothing else. There is no premium tier, no feature held back behind a payment, and no plan to introduce one. Every tool works fully for everyone.
The site is run by one person, and the running costs are close to nothing precisely because of how it is built: static pages on inexpensive hosting, with your device doing the actual work. That is what makes a genuinely free tool sustainable rather than a loss leader for something else.
What it will not do
Being straightforward about limitations seems more useful than pretending they do not exist.
- PDF to Word and similar conversions into editable documents are not possible here. Reconstructing a document's layout from positioned text requires machine learning models running on substantial hardware, not a browser tab.
- Optical character recognition is not included, so a photographed page will not become searchable text.
- Very large videos can exhaust the memory a browser tab is permitted to use. There is a warning before you start, but a two-hour recording is genuinely beyond what a browser can manage.
- Older browsers may struggle, since the tools rely on capabilities only reliably available in the last few years.
Where it goes next
New tools get added when there is a genuine gap, rather than for the sake of a longer list. If something you need is missing, or something here fails on your device, getting in touch is genuinely useful. Bug reports from real files on real devices are worth more than any amount of testing in isolation.