Compressby vztool

WebP compressor online

Compress WebP online.
Ready to send.

Compress static or animated WebP locally. Set a size limit, preserve transparency and download the actual result.

Local processing · No account needed

Choose an image to compress
Drop a file here or choose one from your device.

WebP · Up to 25 MiB

Your file stays on your device.
See how compression works ↓

WebP compressor online

This page accepts static and animated WebP. Animated files keep every frame with WebP or APNG output. JPG is available for static images.

Compress creates a separate output. Keep the original and check the result before sharing the smaller copy.

How to compress an image

  1. Choose your image

    Open a file and check its original size.

  2. Choose a target or quality

    Use a maximum file size for an upload requirement. Use quality mode when detail matters more than a particular number.

  3. Preview the result

    Compare the output and check the details that matter.

  4. Download the smaller copy

    Save the output when it looks right. Keep the source if you may edit it again.

Choose quality and resolution carefully

WebP quality can change color detail. Target size mode lowers quality and then dimensions when needed. An efficient source may stay unchanged. WebP encoding must be available in your browser.

Compress under an upload limit

Choose KB or MB, or use a common size preset. 1 MB equals 1,000 KB here. The target applies to each file in a batch; check the actual downloaded size before uploading elsewhere.

Target size mode automatically lowers quality and resolution to fit. Use Quality mode for manual control.

The original stays unchanged. Check the actual output size and dimensions, then compare the result before sharing.

Leave some room below the receiving service’s limit. Its current upload rules and any attachment overhead may affect what is accepted.

Measured compression example

Example results depend on the file, settings, browser and device. A maximum size is a target, not a guarantee.

Illustrative demo · · Edge 155.0.4283.45 · win32 10.0.26300 · Intel(R) Core(TM) i7-14650HX

Original: 1,449,936 B · 1536 × 864 · Format: WEBP

Target sizeResultResolutionseconds
100 KB99,828 B1536 × 8640.97
50 KB49,832 B990 × 5570.65
Original
Original
Result
Result · 100 KB
Result
Result · 50 KB

Original · Result 100 KB · Result 50 KB · Measure the output and keep your original.

Image formats and transparency

Animated PNG and WebP keep every frame and full transparency. PNG is lossless; WebP quality changes colors. Target mode may reduce dimensions.

Image compression questions

Yes. Animated WebP and APNG keep their frames and full transparency. Choose Original format, WebP or PNG. Check the actual animation before sharing.
JPG and WebP may lose detail. PNG keeps transparency but may be resized in target size mode. Compare both images at the same display size.
Target size mode automatically lowers quality and resolution to fit. Use Quality mode for manual control.
Choose Custom dimensions. Lock the aspect ratio to fit each image within the width and height limits, or unlock it to stretch. Images are never enlarged; target size mode may reduce them further.

Compression guides

Keep photos and form images clear

Keep transparent edges clean

Prepare an animated GIF for sharing

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