Compress JPEG Online

Reduce JPG file sizes by up to 80% with a live quality preview — all inside your browser. No upload, no server, completely private and free.

Compress JPEG Free →Free · No signup · No upload

JPEG is the most common photo format on the web, but unoptimised JPEGs are often far larger than they need to be. A high-quality camera JPEG can easily be 5–10 MB — but the same image compressed to 80% quality is typically under 1 MB with no visible difference. Resizor's online JPEG compressor makes it easy to reduce JPG file size without losing visible quality, directly in your browser with no upload required.

Simply drop your JPEG files in, adjust the quality slider, and compare the before/after preview to find the right balance. The compression runs via WebAssembly (wasm-vips) in your browser, so your photos are never sent to any server. Batch upload is supported — you can compress hundreds of JPEGs in one go. Download individually or all at once as a ZIP.

How It Works

Upload Your JPEG

Drop your JPG or JPEG file into the tool. You can upload multiple files at once for batch compression.

Adjust Quality

Use the quality slider (1–100%) to control compression. A live preview shows the before/after difference.

Download Compressed JPEG

Save your optimised JPEG file — typically 40–80% smaller than the original.

Why Choose Resizor?

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No Upload Required

JPEG compression happens 100% in your browser using WebAssembly. Your photos never touch a server.

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Live Preview

Compare the original and compressed JPEG side-by-side before downloading to get the quality you want.

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Batch Compress

Select multiple JPEG files at once and compress them all in a single step.

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Free & Unlimited

No account, no watermarks, no daily limits. Compress as many JPEGs as you need for free.

Frequently Asked Questions

What is the best quality setting for JPEG compression?

For photos shared on the web, a JPEG quality of 75–85% is usually the sweet spot — it's virtually indistinguishable from the original but 40–60% smaller. For print, use 90%+ to preserve fine detail.

Can I compress a JPEG without losing quality?

JPEG is a lossy format, so some quality is lost whenever you compress. However, at quality levels of 80–90% the difference is imperceptible to the human eye. For truly lossless compression of photos, consider converting to WebP lossless or PNG.

How much can I reduce a JPEG file size?

Depending on the original quality and content, you can typically reduce a JPEG by 40–80% with a quality setting of 75–85% and no visible degradation.

What is the difference between JPEG and JPG?

There is no difference — JPG and JPEG are the same format. JPG is just a shortened version of the file extension used on older Windows systems that required 3-character extensions.

Should I convert JPEG to WebP instead of compressing?

For web use, yes. WebP achieves 25–35% better compression than JPEG at the same visual quality. Resizor can convert your JPEG to WebP in one step from the compress tool.

Compress JPEG Online — Start Now

100% free, runs in your browser. No signup required.

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