Original
Compressed
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Versions tried
Every version here is real and ready. Tap one to keep it instead.
How this was measured
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Visual match
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Nothing to compare yet.
Every version here is real and ready. Tap one to keep it instead.
This page opens Pocketsize with the file type pinned to AVIF — the newest of the widely supported image formats, and routinely the smallest for photographs. Drop PNGs (or anything else) and each is encoded to AVIF at several quality levels, measured against your original, smallest passing file kept.
A PNG photograph is often ten times bigger than an AVIF that looks the same, so the savings here can be dramatic — and because every result carries a measured visual-match score and a side-by-side comparison, you see precisely what the smaller file cost before you keep it. Transparency survives the conversion: AVIF has a full alpha channel.
Your pictures never leave your computer: the compression runs in your browser, on your own device, and you can verify that yourself in about a minute. After one visit it even works with no internet at all.
This page is Pocketsize with the plan pre-set for one job. Nothing is locked — change any control once it is open.
Every current major browser displays AVIF. Older browsers and some desktop software still do not — for maximum compatibility with old systems, WebP or JPEG remain the safer handoff.
AVIF spends more computing to find more savings; that is the trade. Pocketsize runs it in parallel workers and shows the first good result in seconds while the search finishes behind it.
No — the AVIF encoder itself runs inside your browser. The link above shows how to verify the network stays silent.