Compress WebP Images Online
Make WebP files even smaller — to an exact KB target — without them leaving your device.
100% in your browser — files never uploaded
How to compress a WebP file
Drop a WebP image and either set a quality level or switch to Target Size mode and type the exact KB you need. The tool re-encodes the file as WebP at the highest quality that fits, entirely in your browser.
Why compress WebP when it's already efficient
WebP beats JPG at the same quality, but files exported from design tools or cameras often carry quality 90+ settings far beyond what the web needs. Re-encoding at quality 75–85 typically halves the size with no visible change.
WebP in, WebP out
This tool keeps the format locked to WebP on both ends — no silent conversion to JPG, no alpha channel loss. Transparency in your WebP survives compression.
Compress WebP to an Exact KB Target
WebP is the web's efficient default, but efficiency at export time isn't guaranteed: design tools and converters routinely write quality-95 WebP files two or three times heavier than they need to be. This compressor re-encodes WebP-to-WebP at the setting you choose, or — when a CMS, marketplace or portal names a hard limit — binary-searches quality levels in Target Size mode until the file lands at or just under your KB number, with the most visual quality that limit allows.
Keeping the Format Honest
Many 'WebP compressors' quietly convert to JPEG, which destroys transparency and can actually enlarge graphics with flat colors. This tool locks WebP on both ends: the alpha channel survives, flat-color regions keep WebP's clean handling, and the file you download is genuinely the same format you uploaded — just lighter. That makes it safe for logos, product cutouts and UI assets where transparency is load-bearing.
Page Speed Budgets and Image Weight
Image weight remains the largest slice of a typical page's transfer size, and Core Web Vitals put a number on the cost. A hero image trimmed from 400KB to 150KB is routinely the single cheapest LCP win available. Compress the heaviest images first — and if some assets are still JPG or PNG, convert them with JPG to WebP before compressing, since format choice usually saves more than quality tuning alone.
Frequently asked questions
Can a WebP file really get smaller?
Usually yes — most WebP files in the wild were encoded at very high quality settings. Re-encoding at quality 75–85 typically cuts 30–60% with no visible difference.
Does compression remove WebP transparency?
No — the output stays WebP and the alpha channel is preserved, so transparent logos and graphics keep their transparency.
How do I hit an exact size like 100KB?
Switch to Target Size mode and enter 100 — the tool binary-searches quality levels and lands at or just under your target automatically.
Is my image uploaded for compression?
No — encoding runs on the Canvas API in your browser. The file never leaves your device.
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Data verified: 2026-07-11 · All processing happens in your browser — no files are ever uploaded.