WebP Compressor
Compress WEBP files online. Reduce WEBP file size while keeping quality — choose a target size or quality level. Free, fast, no watermark.
Max file size 50MB. Sign up for more.
| File Name | Size | Compress To |
|---|
Checking files and selected compression settings.
Create a free account to track usage, then upgrade for more monthly compressions and larger batch limits.
How to Compress WebP Files Online
WebP is already one of the most efficient image formats. Our tool pushes it further with advanced re-encoding to hit exact file-size targets.
Select your WebP files — static images or animated WebP sequences. The tool handles both lossy and lossless WebP inputs. Batch upload up to 50 files.
Pick a target file size. WebP supports both lossy and lossless modes — our engine picks the optimal mode and quality factor to hit your target with the best visual result.
Download your optimized WebP files ready for the web. The output format stays WebP — no conversion. Individual download or ZIP batch available.
Why Choose Our WebP Compressor
Lossy WebP uses the VP8 video codec's intra-frame encoding with predictive coding and adaptive quantization, producing files 25-35% smaller than equivalent JPEGs.
WebP lossless compression uses spatial prediction, color transforms, and entropy coding. It produces files 26% smaller than PNG on average with zero quality loss.
Unlike JPG, WebP supports full transparency in both lossy and lossless modes. Lossy WebP with alpha is typically 3x smaller than a PNG with the same transparency.
WebP is supported by all modern browsers — Chrome, Firefox, Safari 14+, and Edge. Global browser coverage exceeds 97%, making it safe for production web use.
WebP lossy files are 25-35% smaller than JPEG at the same visual quality, and WebP also supports transparency which JPEG cannot.
WebP supports animated sequences as a modern replacement for GIF, delivering significantly smaller file sizes with better color depth and transparency.
Already efficient, so expect less headroom
WebP is already an efficient format, so there is less to reclaim than with JPEG. In our own testing the same photo saved as WebP started at 1.9 MB against 3.4 MB as a JPEG — and a 1MB target cut the WebP by 49% versus 73% for the JPEG. It still hits the size you ask for, but expect an aggressive target to cost visible quality sooner than it would on a JPEG.
Upload limits worth knowing
The caps people most often run into, and what each one really means in practice.
| Where | Limit | In practice |
|---|---|---|
| Gmail | 25 MB | Attachments above this are converted to a Drive link instead of sending. |
| Outlook.com | 20 MB | Outlook desktop against Exchange is often capped lower, at 10 MB. |
| WordPress (default) | 2 MB | Set by PHP's upload_max_filesize; many hosts leave the default in place. |
| Largest Contentful Paint | under 2.5s | Google treats 2.5s as the good threshold; the hero image is usually what decides it. |
Email attachments are Base64-encoded in transit, which inflates them by roughly 33%. A 20 MB file arrives as about 27 MB, so a 25 MB cap is really closer to 18 MB of actual payload. Leave headroom rather than compressing to exactly the published limit.
How WebP compression works at this target
WebP is a VP8-derived format that ships in two modes: lossy (≈25-35% smaller than JPG at the same visual quality) and lossless (≈26% smaller than PNG). Our compressor uses lossy mode by default and tunes the quality parameter downward to hit the target. The quality-vs-size curve is smoother than JPG — going from quality 90 to 60 in WebP typically produces less visible degradation than the equivalent JPG drop. All modern browsers (Chrome, Firefox, Safari 14+, Edge) support WebP natively.
Which target size to pick for WEBP
Different portals cap WEBP uploads at different sizes. Pick the target that matches where you’re uploading rather than shrinking blindly — over-compressing wastes visible quality, under-compressing gets rejected.
WebP Compressor FAQ
Quick answers about compression targets, upload limits, format behavior, and the best cases for compressing WEBP files.
How do I compress WEBP files online?
What sizes can I compress WEBP to?
How does WEBP compression work?
Will compressing reduce WEBP quality?
Is the WEBP compressor free?
Are my WEBP files kept private?
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