Compress WebP Online

Shrink WebP file size in your browser. Quality slider, optional resize, never uploaded.

How to compress a WebP online

Drop a WebP onto the box above. Set the quality slider — 80% is a safe default that usually cuts file size by 30–60% without any visible quality loss. If you also need smaller dimensions (for thumbnails, social media, or mobile-first sites), pick a Max Width preset. The compressed WebP downloads instantly.

Why compress WebP?

WebP is already 25–35% smaller than JPEG at the same quality, but most WebPs in the wild are saved at 90–100% quality. Dropping to 80% — the level where the difference becomes invisible to the human eye — typically cuts another 30–60% of file size. That is meaningful for Core Web Vitals, mobile data costs, and SEO.

What you can do

Compress WebP, JPEG, PNG, or GIF — output is always WebP
Quality slider from 20% to 100%
Optional max-width downscale (1920, 1280, 800, 400 px)
Batch — drop multiple files, download all at once
Before/after sizes shown per image
No watermark, no signup, no upload

Frequently asked questions

How do I compress a WebP image online for free?

Drop one or more WebP images onto the box above, set the quality slider (75–85% is a good default), and download the compressed result. No account, no upload, no watermark.

Does ToolChop upload my WebP files anywhere?

No. The Canvas API runs the encode entirely in your browser. Your files never leave your device — there is no upload, no temporary storage, and no copy on our servers.

How much can I shrink a WebP file?

Most WebP files compress 30–60% at 80% quality with no visible loss. Aggressive compression at 50–60% can hit 70%+ savings on photos, but you may see soft edges on text and graphics.

Why is my WebP already small — is more compression worth it?

WebP is already efficient. The biggest wins from this tool come from (a) resizing oversized WebPs to the size they are actually displayed at, and (b) re-encoding from a high quality WebP down to 80%. Use the Max Width control alongside Quality.

What is the difference between WebP and JPEG compression?

WebP typically produces files 25–35% smaller than JPEG at the same visual quality, thanks to better prediction modes and entropy coding. The trade-off is that very old browsers and some image viewers do not support WebP — but in 2026 that affects less than 5% of users.

Does compressing a WebP twice degrade it?

Yes — like JPEG, WebP is a lossy format, so each re-encode discards a little detail. For best results, compress once from the original source. If you only have a WebP, one extra compression pass at 80% is usually invisible.

Can I drop JPEG or PNG and get a WebP out?

Yes. The tool accepts WebP, JPEG, PNG, and GIF inputs and always outputs WebP. This is useful if you want to switch a website's assets to WebP for faster page loads.

Will WebP work on iPhone, Safari, and email?

iOS 14+ and macOS Big Sur+ Safari fully support WebP. Outlook and Gmail render WebP images. The main holdouts are some very old image viewers and a handful of corporate email clients — for those, convert to JPG using our WebP-to-JPG tool.

Does this tool support animated WebP?

Animated WebP input is read as the first frame only — the output is a still image. For animated GIF or animated WebP compression, use a dedicated tool that preserves frame data.

How do I compress WebP under 100 KB?

Combine the two controls: set Max Width to 800 or 1280 px (this alone usually halves the file), then drop quality to 75%. Most photos hit under 100 KB at 1280 × 75% and under 50 KB at 800 × 75%.

Is WebP better than AVIF?

AVIF compresses 20–40% better than WebP at the same quality, but encodes slower and has slightly less universal support. For most websites in 2026, WebP is the safer sweet spot. Use AVIF when you have a CDN that can serve format fallbacks automatically.

Why is the compressed WebP sometimes larger than the input?

If your source WebP was already at very low quality (say 60%) and you re-encode at 90%, the encoder spends extra bytes preserving artifacts. Always re-encode at the same quality or lower. If you see a size increase, lower the quality slider.

Can I batch compress WebPs?

Yes — drop multiple files at once. Every file is compressed in parallel and listed with individual before/after sizes. Use the Download All button to grab them in one click.