WebP compression

Compress WebP Images

Lower the quality of existing WebP files, or cap them to a precise file size — batched and processed locally.

Free · No limits Quality slider Target size in KB/MB Transparency kept Batch + folders

Failed to load resources

The image engine could not be loaded, possibly due to a network hiccup or an app update. Refresh the page and try again — your files stay on your device and are never uploaded.

Drop images here, or click to choose

Add multiple images at once, choose an entire folder, or just Ctrl+V to paste from your clipboard. Processing starts automatically with the current settings. Every operation runs in your browser.

JPG PNG WebP AVIF Batch processing

/ Before After Saving %

Output settings

Output format

Image quality

Applies to JPEG, WebP and AVIF. 75%–90% is usually a good balance.

PNG is lossless and has no quality slider. Converting photos to PNG may make them larger.

Max file size

Resize

Max width Max height

New settings apply to the whole batch only after you click here.

Images are decoded and re-encoded only in your browser. Nothing is uploaded.

Formats: JPG PNG WebP AVIF
Engines: MozJPEG · OxiPNG · libavif
Privacy: 100% local
Batch: Folders / paste

Free · Online · No file-count limit · No sign-up

Already WebP — why re-encode?

WebP is efficient, but the file you have was encoded with somebody else's settings. A screenshot exported at quality 95, or a hero image resized by a CMS, often carries far more data than the page needs. Re-encoding at quality 75–85 usually takes another 30–60% off without a visible difference.

WebP also supports transparency, so icons and cut-out product shots can stay WebP and keep their alpha channel while getting smaller — something a JPEG conversion would destroy.

This page fixes the output format to WebP. Quality and the optional size cap are the two settings that matter; dimensions stay untouched unless you enable resizing.

How to compress a WebP image

Add WebP files

Drag them in, pick a folder, or paste from the clipboard. Output is already locked to WebP.

Choose quality or a size limit

Start at 80. For strict budgets (ads, email, CMS uploads) enter a max size in KB or MB and let the tool find a quality that fits.

Save

Download individually or as a ZIP. If re-encoding cannot beat the original, the original is kept automatically.

Questions about this task

Why did my WebP get bigger after compressing?

If the source was already encoded at a low quality, re-encoding at a higher quality grows it. The tool detects that case and keeps the original file, labelled "Kept original".

Does WebP compression keep transparency?

Yes. Both lossy and lossless WebP support an alpha channel, so transparent logos and product cut-outs stay transparent after re-encoding.

Should I use WebP or AVIF for web images?

WebP encodes fast and is supported by every current browser. AVIF is usually another 20–40% smaller but much slower to encode. For bulk work WebP is the safer default; AVIF pays off for static sites where file size matters most.

Other image tasks

Same local processing, different starting point:

Compress JPG Images

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Compress PNG Images

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Back to Image Compressor & Converter

All formats in one workspace — batch compression, conversion, resizing and before/after comparison.