web
Landing pages
Faster LCP without giving up the asset quality.
$ hyperpng compress▌
Shrink PNGs by 60–80%.
Pixels intact.
A no-frills PNG compressor. Drop a file. Get one back — alpha preserved, metadata stripped, files purged in 24h. No signup needed.
LIMIT20MB / fileENGINElossy paletteALPHApreservedTTL24h
compressor.png
ready
resizeno resize — original dimensions
PNG only · up to 20MB · batch max 30 · stripped of metadata · purged in 24h
avg_savings
71%
across the last 1k uploads
median_time
380ms
end-to-end on a 2 MB PNG
files_kept
0
we delete originals after queueing
01 · how_it_works
Three steps, no upsell.
01
Drop a PNG
Drag a file onto the zone above, or click to browse. Up to 20 MB.
02
Optimise the palette
We rebuild the image with a smarter palette: --quality=65-90 --strip --skip-if-larger.
compress --quality=65-90 --strip --skip-if-larger -o out.png in.png03
Download
Lossy palette quantisation, alpha preserved. Indistinguishable on most images.
02 · under_the_hood
No magic. Just smarter pixels.
We rebuild your PNG with a smaller, hand-picked colour palette — same image, fewer bytes. We tune the quality range, strip metadata, and skip the write if the result wasn’t actually smaller. The whole round-trip is queued, so your browser never blocks.
- Lossy palette — visually indistinguishable on flat art and UI.
- Alpha-safe — transparency including semi-transparent pixels.
- Tunable — open Advanced to dial quality_min, quality_max, speed.
- Deletes itself — guest files vanish after 24h. No model training.
~/hyperpng/job_a3f12c
$ file input.png
PNG image, 1920 × 1080, 8-bit/color RGBA · 2.41 MB
$ hyperpng compress input.png
▸ uploading 2.41 MB
▸ queued
▸ optimising palette --quality=65-90 --strip
▸ wrote 682 KB
✓ done in 412ms · saved 1.74 MB (−72%)
03 · formats
PNG today. More on the queue.
| format | status | engine |
|---|---|---|
| PNG | live | lossy palette quantisation, alpha-safe |
| JPEG | next | scoped quality + chroma subsampling |
| WebP | next | both lossy & lossless modes |
| AVIF | later | heavier, future-proof |
| SVG | later | strip + minify |
| GIF | later | frame-level optimisation |
04 · use_cases
Made for shipping pixels.
ui
App icons
Ship lean PNGs to mobile and desktop bundles.
Newsletters
Stay under inbox limits without recompression.
docs
Documentation
Compress dozens of screenshots before pushing.
social
Social posts
Beat platform limits, avoid their mangling.
game
Game art / sprites
Save bandwidth — alpha channels stay intact.
05 · faq
Frequently asked.
Is HyperPNG really free?
Yes. Guests get a few free compressions. Registered users get 100 per day, no credit card.
How much smaller will my PNG get?
Most files shrink 60–80%. Flat illustrations, screenshots, and UI exports compress hardest; photos saved as PNG less so.
Will the result look the same?
On most images, yes — the default quality range is tuned to be visually indistinguishable. Tunable under Advanced.
Does compression keep transparency?
Yes. The full alpha channel is preserved, including semi-transparent pixels.
Do you keep my files?
Guest uploads vanish in 24 hours. Logged-in users keep history 30 days, or delete it manually.
What's the size limit?
20 MB per file. That covers the vast majority of real-world PNGs.
JPEG / WebP / AVIF support?
Not yet — PNG only at launch. JPEG and WebP are next on the roadmap.
How does compression actually work?
We use lossy palette quantisation: the image is rebuilt with a smaller, smarter colour palette. Visually identical to the original on most images, but often half the size or less.
$ hyperpng register
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