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Image Compressor

Drop images to shrink them in bulk while keeping them sharp. Convert to WebP or AVIF, resize, and compare before and after. Your images are never uploaded.

On-device・No upload

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

Drop files here (multiple allowed)

or

Images are compressed in this browser on your device and never uploaded.Accepts: JPEG / PNG / WebP / AVIF / GIF / BMPUp to 50 MB per filePaste (Ctrl+V) also works
Compression settingsBalanced · Keep original format · Keep size
Quality

Best balance of quality and size. For the web and email.

PNG files are optimised losslessly when keeping the original format. Choose WebP to shrink them dramatically.

How to use

  1. Drop images or click “Choose files” (multiple files and Ctrl+V paste are supported).

  2. Compression starts right away with the “Balanced” preset. Change quality, output format or size under “Compression settings”.

  3. Check original vs. compressed size and savings in the list. Use “Compare” to inspect quality with a slider.

  4. After changing settings, click “Recompress with these settings”.

  5. Download images one by one or all at once as a ZIP.

What it does

High-quality encoders

MozJPEG for JPEG, libwebp for WebP, libavif for AVIF and OxiPNG for PNG, all running as WebAssembly — smaller files than the browser’s built-in export at the same quality.

Keeps the original when recompression doesn’t help

Already-optimised images can grow when re-encoded. When re-encoding in the same format at the same size would make a file larger, the original is kept (on by default). Images that still carry location or other metadata are always re-encoded so the metadata is removed, and format conversions always use the converted file.

Before/after comparison slider

Overlay the original and the result and drag the divider to inspect quality. Arrow keys work too.

Batch processing & ZIP download

Process up to 200 images at once. Failures don’t block the rest, and you can include a report.csv in the ZIP.

Strips location metadata

Re-encoding removes EXIF data (date, camera details, GPS). Orientation is applied to the pixels, so photos never end up sideways.

Stays responsive

Compression runs in background Web Workers and can be stopped at any time; the page remains usable during large batches.

Use cases

  • Lighten images on a website or blog to improve loading speed (Core Web Vitals)
  • Fit attachments under email or chat size limits
  • Shrink large phone photos to a shareable size in one go
  • Make PNG screenshots smaller without any quality change
  • Convert images to WebP or AVIF for even smaller files

Supported formats

Input

JPEG (.jpg / .jpeg / .jfif)PNGWebPAVIFGIF (still)BMP

Output

JPEGWebPAVIFPNG (lossless)Same as input

Capability matrix

FeatureSupportNotes
Lossy JPEG / WebP / AVIF compression (quality 1–100)Supported—
Lossless PNG optimisationSupportedTypically 5–30% smaller
Convert to WebP / AVIF / JPEG / PNGSupported—
Resize by long edge (never upscales)Supported—
Before/after comparison sliderSupported—
Batch, ZIP download, report.csvSupportedUp to 200 files, 50 MB each
Remove EXIF and GPS dataSupportedAlways removed (cannot be kept)
Lossy PNG colour quantisationNot supportedConvert to WebP for large savings instead
Animated GIF / APNG / animated WebPNot supportedNot processed, to avoid losing the animation
HEIC (iPhone photos)PartialWorks in Safari; other browsers may not open HEIC
Wide gamut (Display P3) and ICC profilesPartialOutput is converted to sRGB

Limits & notes

  • Up to 50 MB per file and 200 files per batch; up to 100 megapixels per image (e.g. 10000×10000).
  • AVIF encoding is slow (seconds to tens of seconds per image). Choose WebP when speed matters.
  • Transparent areas become the chosen background colour (white by default) when saving as JPEG.
  • ICC colour profiles are not preserved; images are output as sRGB.
  • Processing uses your device’s CPU and memory; older phones may be slow with many large images.

Privacy & safety

Reading, compressing and zipping all happen inside your browser. Images are never sent to or stored on a server. Only the compression engine (WebAssembly) is downloaded the first time you use it.

FAQ

How much quality is lost?
The default “Balanced” preset is visually indistinguishable for typical photos. Use “Compare” to check against the original, and switch to “High quality” if you notice a difference.
Why don’t PNG files get much smaller?
When keeping the PNG format, we optimise losslessly — every pixel stays identical — which usually saves 5–30%. To shrink them dramatically, choose WebP as the output format; transparency is preserved.
Should I choose WebP or AVIF?
WebP displays almost everywhere and encodes quickly. AVIF is even smaller but slower to encode and unsupported by some older software. If unsure, choose WebP.
Is the photo’s location kept?
No. Re-encoding removes EXIF including GPS location. To remove metadata without changing image quality at all, use the “EXIF & GPS Remover” tool.
Are my images uploaded?
No. All processing happens in your browser; images never leave your device.

Related tools

Image Converter

Choose the target format first, then drop images to convert them in bulk. Tune quality per format, use lossless WebP, set a background for transparency and name the output files — nothing is uploaded.

Image Target Size

Pick a limit like “under 200 KB” and get the best-looking JPEG or WebP that fits. Quality is lowered first; pixels are reduced only if that is not enough. Nothing is uploaded.

Icon Generator

From one image (or a letter or emoji), get favicon.ico, apple-touch-icon, Android/PWA icons, a maskable icon and an OGP image, plus the manifest and the <head> code to paste. Check blur at real size first — nothing leaves your browser.

Batch Image Resizer

Drop a batch of images and resize them by width, longest edge, box crop and more. Make several sizes (say 320, 640 and 1280) from each image in one go, then copy ready-made srcset HTML. Your images are never uploaded.

Crop, Pad & Canvas

Drag to crop, then rotate, straighten and add padding on one screen. Export straight to the recommended X header or Instagram size. Your image is never uploaded.

Image Editor

Annotate a screenshot or photo, reliably hide what must not be seen, tune the colours and export — on one screen. Made for how-to guides, bug reports and social posts. Your image is never uploaded and exports carry no metadata.

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