Compress WebP Online — Free, No Signup
Compress WebP online in one step. Drop the file, choose a quality level, and download a smaller image. Useful when a WebP export came out heavier than expected, or when you need a format every piece of software can actually open.
How to do it
- Drop your WebP file onto the upload box.
- Pick a quality level — WebP is already efficient, so try 75 before going lower.
- Check the size saved under the preview.
- Download the compressed image.
WebP is already compressed, so why is yours big?
WebP usually beats JPEG by 25 to 35 percent at matched quality, so a large WebP normally means one of three things. It was exported at a very high quality setting, in which case there is real headroom to reclaim. It is lossless WebP, which some design tools emit by default and which behaves like PNG — big, exact, and full of reclaimable redundancy. Or it is simply a very large image in pixel terms, in which case the encoding is not the problem and resizing is the actual fix. Checking the dimensions before you compress saves a lot of guessing.
What you get back
This tool re-encodes to JPEG rather than back to WebP. That is worth knowing up front. You lose the alpha channel and a few percent of WebP's efficiency, and you gain a file that opens in absolutely everything — older email clients, print shops, government upload forms, and software that still has not caught up with WebP a decade after its release. If you specifically need WebP out the other end, use the format converter, which encodes WebP directly and keeps transparency intact.
Compatibility is the usual reason people convert
Every current browser reads WebP, but plenty of other software does not. Photo printing services, older versions of Office, some content management uploaders, and a fair number of mobile apps will simply refuse the file. If something rejected your image without explaining why, the format is the first thing to check. Running it through here produces a JPEG that is both smaller and universally readable, which solves the size problem and the compatibility problem in one step.
Choosing quality for a WebP source
Because WebP has usually already discarded the easy detail, re-encoding at very low quality compounds the loss and shows it faster than it would on a camera original. Stay at 75 or above for anything that will be looked at closely. Quality 70 is fine for web use and social posts. If the source was lossless WebP you can go lower safely — there is a full lossless image underneath, and the first lossy pass is doing all the heavy lifting.
Limits
5 MB maximum input. Output is JPEG, quality clamped between 10 and 95, transparency flattened onto white. Pixel dimensions are preserved exactly. Everything runs locally in your browser, so nothing is uploaded and there is no processing queue to wait in.
Frequently asked questions
Do I get a WebP file back?
No, the output is JPEG. Use the format converter if you need WebP out, including WebP with transparency preserved.
Why compress a WebP at all, if it is already efficient?
Efficient at a given quality, yes. But a WebP exported at quality 95, or a lossless WebP, still carries a great deal of reclaimable size.
Will transparency survive?
No. JPEG has no alpha channel, so transparent pixels are composited onto white. The converter preserves alpha if you target PNG or WebP.
Something rejected my WebP upload. Will this fix it?
Usually. Converting to JPEG solves the compatibility problem behind most WebP rejections, and shrinks the file at the same time.
Does re-compressing damage the image twice?
Yes, if the source was already lossy WebP. Stay at quality 75 or higher on a lossy source to keep the second pass from being visible.