Why compress WebP files further?
WebP is already an efficient format, but high-resolution WebP images can still be larger than a specific project needs. If you have a strict per-page weight budget for performance reasons, or a platform that caps upload sizes, further compression is necessary even when the format is already good.
WebP supports both lossless and lossy compression modes. High-quality exports from design tools often default to near-lossless settings, which produces larger files than are needed for web delivery. Re-compressing with a more aggressive quality setting captures significant savings while keeping the image visually clean.
Unlike converting to JPEG and back, compressing a WebP to a smaller WebP keeps you in the most efficient web format. There is no format overhead from unnecessary conversion, and transparency is preserved if the image uses it.
Set a realistic target size based on how the image will be used. Hero images can often go down to 150-250 KB. Thumbnails and card images should target 30-80 KB for fast page loading.
Compress WebP in three steps
The compression runs locally on your device. Nothing is ever shared or stored.
Upload your WebP
Drag the WebP file onto the tool or click to browse. The original dimensions and file size are shown.
Set target size and max width
Enter a target size in KB. Optionally set a max width to scale the image down, which achieves even greater size reduction.
Download compressed WebP
Click Download to save the smaller WebP file. The output size is shown so you can compare against the original.
Tips for compressing WebP files
Combine resizing with compression
Reducing dimensions is often more effective than just changing quality. A 2400px image served in a 800px slot wastes 9x the pixels it needs.
Target 80-85% quality for photos
At this range the visual difference from the original is imperceptible on standard screens. Below 70% and compression artifacts start to show.
Keep originals in full quality
Always store the original high-quality WebP or source file. Once you compress down, you cannot get those pixels back.
Test across devices
A compressed image that looks fine on a desktop monitor may show more obvious artifacts on a phone screen held close up. Test on mobile.
Check transparency after compression
If your WebP has transparent areas, verify that edges look clean and the transparency is fully preserved in the compressed output.
Frequently asked questions
Will compression damage my WebP?
At reasonable quality settings the visual difference is minimal. The tool targets the size you specify while preserving as much quality as possible.
What is the maximum input size?
You can compress WebP files up to 20 MB using this tool.
Can I resize and compress at the same time?
Yes. Set the Max Width slider to scale the image dimensions as part of the compression process. Smaller dimensions mean much smaller file sizes.
Is my file private and secure?
Your images are processed securely and stay private. They are never shared or stored anywhere.