How it works

Converting a file

Open the converter and leave it on Convert.
Drop your files on the box, click it to browse, or paste with Ctrl+V.
The buttons that appear are the formats your file can become, an image offers JPG, PNG, WebP and PDF; a PDF offers images, text or Word; a Word document offers PDF or text.
Press the button. It counts your files, so you can see what is about to happen.

Compressing

Switch to Compress. For images, around 80% quality is the usual sweet spot: roughly a fifth of the original size with no visible difference. Leave the format on Auto and each image is encoded every way your browser supports and kept at whichever came out smallest, a PNG screenshot often shrinks by 90% as WebP, while a photograph that happens to be a PNG is usually smallest as JPEG.

PDFs work differently. A browser cannot re-encode the images buried inside a PDF, so compressing one means re-rendering its pages. That shrinks scans enormously, because a scan is already a picture, but it turns any real text into part of an image, so it stops being selectable and searchable. The panel warns you before you press the button. If your PDF is text and already small, do not compress it.

Resizing

Switch to Resize, then give a width, a height, or one and let the other follow. Fit inside scales the whole image into your dimensions and crops nothing. Fill and crop covers the box and trims the overflow evenly, which is what avatars and thumbnails want. Stretch forces exact dimensions and distorts the picture. Enlarging invents no detail, a 400px image blown up to 2000px is a soft 2000px image, so go back to the original if you need it bigger.

Why nothing is uploaded

Browsers have been able to decode, re-encode and rebuild files locally for years. Most converters still upload, because sending the file to a server is the easier way to build a website, and it means your file sits on a machine you do not control, under a retention policy you did not read. The files people convert are rarely holiday snaps; they are passport scans, contracts, medical letters and photographs of their children.

You do not have to take this on trust. Open your browser's developer tools, switch to the Network tab, and convert something: there is no upload to see. The site also keeps working with your internet connection switched off, once the page has loaded, which would be impossible if a server were doing the work.

What it costs

Nothing, and there is no account. The site is paid for by advertising placed around the tool, never over it. Ads cannot see your files, because your files never leave your device for anyone to see.

What it cannot do

A browser reads far more image formats than it writes, it decodes almost anything, but can only produce JPG, PNG and WebP. Converting a PDF or a Word file to text recovers the words but not the design, because a PDF stores where marks sit on a page rather than what they mean. And a scanned PDF holds no text at all, only pixels; reading those needs OCR, which is a different job. If you cannot select the words in a PDF reader, nothing here will find them.

A page for each conversion

Every conversion also has its own page, with notes on that particular one, what it keeps, what it costs, and what to expect. Same tool underneath.