Image | Compress

Compress images online

Compress JPG, PNG, and WebP files in your browser. Batch dozens at a time. Nothing uploads.

Image compressor reduces the byte size of JPG, PNG, and WebP images while preserving visual quality. Compression runs locally in your browser with no upload. Image Compressor on DocTools helps you compress images to reduce file size, with no account needed.

Free to use
No signup
No uploads
Works offline

Why use Image Compressor

Lossy or lossless per format
Batch export as ZIP
Preserves EXIF unless stripped
Files never leave your device

Compression runs locally in your browser via WebAssembly. Nothing is uploaded.

How to use Image Compressor

Add your images Drop one or more images into the tool.
Choose compression Select lossy quality or lossless mode.
Download the results Save individual files or a ZIP.

Benefits

Faster sites, happier users

Smaller images translate to lower LCP scores and better mobile experience.

Storage that lasts

Trim photo libraries and asset folders by 40-70% with no visible impact.

Privacy first

Compression runs locally, so personal photos and unreleased brand assets never leave your device.

Who it is for

E-commerce

Slimming a catalog of 500 product photos before upload Outcome: Faster storefront and cheaper CDN bills.

Photographers

Emailing proofs without hitting inbox limits Outcome: Send full sets in one message.

Bloggers

Optimizing hero images for a new article Outcome: Ship without waiting on a designer.

How it works

Image Compressor loads your image into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of Image Compressor happens inside your browser sandbox.

Frequently asked questions

Lossy or lossless?

You choose. Lossy gives the smallest files; lossless preserves every pixel.

Is a ZIP available for batches?

Yes. Multi-file compressions download as a ZIP archive.

What compression is applied?

JPGs use MozJPEG-tuned quantization; PNGs use pngquant palette reduction; WebPs use libwebp near-lossless.

Will EXIF be removed?

Yes by default, which trims a few KB and removes GPS/camera data. Toggle to keep it.

How aggressive can I go?

Choose Balanced (default), Web (aggressive), or Custom to dial per-format quality manually.

Are results visually lossless?

Balanced mode targets SSIM 0.98+, meaning differences are imperceptible in normal viewing.

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Last updated: 2026-07-09