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Compress JPG

Reduce the file size of your JPG images with no visible quality loss. No upload, no signup — compression happens entirely in your browser.

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Tips for JPG compression

✓ Quality 75–85% is the sweet spot

For web images, a quality of 75–85% is optimal. The quality loss is barely perceptible, but file size drops dramatically — typically to 20–40% of the original.

✓ Resize before compressing

If the image will only display at 800 px wide but is 4000 px wide, scale it down first. Surplus resolution costs bandwidth no user ever sees.

✓ Avoid multiple passes

JPG loses quality on every save. Always compress from the original, not from a previously compressed JPG.

✓ Consider WebP as an alternative

WebP files are 25–35% smaller than JPG at comparable quality. If your audience uses modern browsers, WebP is the better choice.

Frequently asked

Do I lose quality when compressing? +

JPG compression is always lossy. At 80% quality the difference is barely perceptible to the human eye, while the file is often 60–80% smaller.

Can I compress multiple JPGs at once? +

Yes! Use the batch mode on the homepage to process multiple JPG files and download them as a ZIP.

Is EXIF data (GPS, camera info) preserved? +

No. The Canvas API used for compression strips EXIF metadata. That's usually a privacy win (no GPS in web uploads) but inconvenient if you need the metadata.

Background & guide2 min read

About this tool

In shortLocal JPG compression with Mozjpeg — sweet-spot quality 78, no upload.

JPG has been the dominant photo format on the web since 1992 and still holds the lead in 2026. The reason: it discards information the human eye cannot perceive well, by splitting the image into 8×8 blocks and quantizing high-frequency coefficients. This makes JPG lossy, but at the right quality setting the loss is invisible and the savings dramatic.

This tool compresses JPG files entirely in your browser. Under the hood it uses Mozjpeg, an Open-Source encoder from Mozilla that adds Trellis quantization, optimized Huffman tables and a better default matrix on top of classic libjpeg-turbo — typically 5–15% smaller files than smartphone defaults at identical visual quality.

Which quality value should you choose?For web photos, 78–82 is the sweet spot. At this setting the file is about 60% smaller than a smartphone default (around quality 95), but the human eye cannot tell the difference even in a side-by-side comparison. For thumbnails go down to 70–72; for skin tones and soft gradients go up to 82–85. Above 88, the extra bytes are invisible.

Metadata.Modern smartphone cameras embed 100–500 KB of metadata in every photo — GPS, camera model, lens, sometimes preview thumbnails. For web use, this is rarely needed and often a privacy concern. Use our EXIF editor after compression to strip metadata cleanly.

What makes this different from cloud tools?Your image never leaves the browser. Processing runs locally via the Canvas API and WebAssembly. Verify it yourself in DevTools (F12 → Network tab). Practical consequences: no upload waits, no file size limit, no account, no tracking. Confidential photos stay structurally private.

When is JPG the right choice?For classic photos: yes. For logos, diagrams or pixel art: no — use PNG, SVG or WebP-Lossless. For modern browser targets: WebP or AVIF are often 25–50% smaller than JPG at the same quality. If you are unsure, use the Multi-Format Compare — it renders the same image as JPG, PNG, WebP and AVIF simultaneously so you can compare file sizes side by side.

Use cases.Web hero images (quality 80), blog inline photos (78), e-commerce product shots (82), email attachments (75 at 1600 px), WhatsApp images (75 at 1280 px). For print, choose quality 90+ or switch to PNG/TIFF — print processes can make JPG block artifacts visible.

See our deep dive JPG without quality loss and the big compression guide 2026 for more.