Compress many images in one pass
Drop in any number of images and apply the same quality and format to all of them. Per-file download buttons and a running total of bytes saved.
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 images
Drop in a folder or pick many files. There's no hard limit beyond memory.
Files stay in memory as an
HTMLImageElement— the original bytes are never uploaded, and EXIF metadata is preserved until you explicitly transform it.uploadcanvaslocaldecodeinput · bytes0 · loadedfiles.length 0
loaded · decodedcanvas · ready - 02
Pick a format
JPEG and WebP are lossy; PNG is lossless. WebP usually wins on size.
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.formatoptionslive previewencoderqualityformat · tunablejpeg · livetoBlob("image/jpeg", q)options applied · liveencoder · live - 03
Compress all
Hit the button — each file is processed in turn, results stream in.
Pixel work runs on the Canvas 2D context —
drawImageresamples with the browser’s bilinear filter andgetImageData/putImageDataback per-pixel passes.runrenderCanvas 2Dpreviewpx-perfectdone · resampled0/0 · px-perfectfor (file of files) await encode(file)
preview · livepx-perfect - 04
Download
Grab individual files or download all once the batch finishes.
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 URLsaved · blob0 B · saved{pct}% savedshipped · 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.
Photo dumps
Shrink a phone export before backup. 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-perfectBuild assets
Optimize design exports before commit. 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-tunableBlog imagery
Right-size hero images in one go. 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-awareCMS upload prep
Tame oversized uploads before publishing. 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-safeQuick bulk fix
Faster than running a CLI tool. 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-sideSharing big sets
Compress before posting to chats. 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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