Reduce PNG palette for smaller files
Cut a PNG's palette down to 8–256 colors with median-cut quantization. Great for illustrations, screenshots, and UI assets.
image/png,image/* · runs locally · nothing uploaded
How it works
Pick an image, tune the options, then download the result. Everything runs in your browser.
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Pick a PNG
Drop or select. Works on any image, though best for graphics.
Files stay in memory as an
HTMLImageElement— the original bytes are never uploaded, and EXIF metadata is preserved until you explicitly transform it.uploadcanvaslocaldecodeinput · bytespng · loadedsource.png
loaded · decodedcanvas · ready - 02
Choose palette size
8 is the smallest; 256 keeps near-original fidelity.
Encoder quality is exposed where the format supports it — JPEG and WebP get a
0–1quality slider; PNG is lossless. Options re-render the canvas immediately.paletteoptionslive previewencoderqualitycolors · tunable64 · livepalette = 64
options applied · liveencoder · live - 03
Run median-cut
The color space is recursively split along the longest axis, mapping each pixel to the nearest bucket centroid.
Pixel work runs on the Canvas 2D context —
drawImageresamples with the browser’s bilinear filter andgetImageData/putImageDataback per-pixel passes.algorenderCanvas 2Dpreviewpx-perfectalgorithm · resampledmedian cut · px-perfectsplitBoxes -> centroids
preview · livepx-perfect - 04
Download PNG
Save the quantized PNG. Often smaller, always crisper on simple graphics.
Downloads ship via a hidden anchor with an object URL — no server round-trip, and the file on disk is untouched. The output filename inherits a sensible suffix.
exportdownloadblobclient-sideobject URLok · blobready · saved-0% size
shipped · ready to shipsuccess
Browser-only image work that scales
Convert with quality control
JPEG/WebP let you pick a 0–1 quality. Default 0.92 is a good compromise of size and visible quality.
PNG isn’t free
Use PNG only for transparency or sharp edges. For photos, WebP is smaller at the same perceived quality.
Strip EXIF for privacy
Photo EXIF often contains GPS, camera model, and timestamps. Strip before sharing public uploads.
Watch the colour profile
Convert to sRGB before web export. Wide-gamut images render oversaturated in non-managed browsers.
AVIF when it’s available
AVIF beats WebP on size at the same quality. Detect support via <picture> with fallbacks.
Lazy-load below the fold
Add loading="lazy" on <img>. The browser handles scheduling — no IntersectionObserver needed.
When to use this tool
Common workflows it speeds up.
UI screenshots
Shrink design docs with limited-palette PNGs. Decoded into a Canvas 2D context — original bytes never leave the tab, so you can process customer-uploaded photos, internal screenshots, or sensitive diagrams without privacy concerns.
px-perfectIcon packs
Reduce file sizes for design system icons. Encoders expose quality 0–1 where the format supports it (JPEG, WebP); PNG and AVIF stay perceptually lossless. Pick 0.85 for web, 0.95 for archival, 0.7 for thumbnails.
quality-tunableIllustrations
Vector-style art quantizes cleanly with no quality loss. Pair with the EXIF Stripper before sharing user-uploaded photos publicly. Camera serial numbers, GPS coordinates, and timestamps often hide in image metadata and leak more than the picture itself.
format-awareEmail assets
Lighter graphics for newsletter images. Output preserves colour profile (sRGB) so it renders consistently across browsers, monitors, and print pipelines. Wide-gamut workflows can opt into Display P3 for modern Apple devices.
EXIF-safeWeb compression
Compete with JPEG file sizes without lossy artifacts. Re-runs only on option changes, never on window resize, so the canvas stays responsive on large images. drawImage uses the browser's bilinear filter for fast resampling.
client-sideRetro art
Get an authentic limited-color look. Downloads as .png, .jpg, .webp, or .avif with the correct MIME so editors apply native handling on save. The filename inherits a sensible suffix derived from the input.
compression-readyFrequently asked questions
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