About UnoWEBP
UnoWEBP is a focused library of free online WEBP tools that run entirely in your browser. Convert, compress, crop, and transform WEBP images without installing anything or uploading your files to a server.
What UnoWEBP Is
UnoWEBP is a collection of practical, WEBP-first image utilities: a WEBP converter, a WEBP compressor, croppers and resizers that keep transparency, and specialized viewers for modern web formats. Every tool is built to make the WEBP format easier to use for everyday tasks.
There are no accounts to create, no files to upload, and no hidden limits on the things that matter. Whether you need to shrink a WEBP for the web, turn a PNG into a WEBP, or crop a round avatar with a transparent background, the tool is one click away.
How Our Tools Are Built and Tested
Every UnoWEBP tool is built in plain HTML, CSS, and JavaScript, with no accounts, no installs, and no artificial caps. Before a tool goes live it is tested across modern browsers to make sure WEBP encoding, transparency, and downloads work as expected.
Tools that users report as broken are fixed or rebuilt rather than left to decay. Image formats and browsers keep changing, so a tool that worked last year is regularly checked again to stay reliable.
Everything Runs in Your Browser
The one rule every tool on UnoWEBP follows is simple: your images never leave your device. When you convert a picture or compress a photo, the work happens locally in your browser using JavaScript and the Canvas API.
This is not a privacy promise you have to take on faith — it is an architecture you can verify yourself. Open your browser’s developer tools, switch to the Network tab, and process an image: you will see that no file is ever sent anywhere.
We built it this way because the images people process are often exactly the ones that should never travel: private photos, client work, and documents with sensitive content. WEBP processing stays on your machine by design.
Free Means Free
No sign-ups, no trials, no watermarks, and no “pro” tier holding back the useful features. UnoWEBP stays online through lightweight, unobtrusive advertising — that is the only cost, and it never touches your files.
Because your files never reach our servers, they cannot be monetized, analyzed, or leaked. Free here means free, not “free until you need the thing you came for.”
Get in Touch
Found a bug, need a WEBP tool we don’t have yet, or spotted something that looks wrong? Get in touch through our Contact page. Reports from users are how UnoWEBP gets better, and we treat corrections as gifts, not complaints.