Compress JPEG

Make JPEG photos dramatically smaller for email, web and uploads — without visible quality loss.

Free forever
No watermark
No signup
Batch ready

Upload your JPEG images.
Each is re-encoded at an optimised quality.
Download the smaller files.

All compressjpeg tools

Compress JPEG Compress JPEG Make JPEG photos dramatically smaller for email, web and uploads — without visible quality loss. Compress PNG Compress PNG Optimise PNG graphics to the smallest lossless size, keeping transparency and crisp edges. Compress to WebP To WebP Convert and compress images to WebP — the smallest modern web format. Resize Image Resize Scale images down to web dimensions for an extra file-size win.

compressjpeg.onl makes heavy images light. The headline tool compresses JPEG photos by up to 70% with no visible quality loss; supporting tools handle lossless PNG optimisation, modern WebP conversion, and resizing. Everything is free, with no watermark and no account.

Smaller images mean faster pages, quicker email attachments, and uploads that slip under size limits. Our guides explain compression, formats, and how to squeeze files without wrecking them.

Right tool for each image

Use JPEG compression for photos, PNG compression for graphics with transparency, and WebP for the smallest web files. Add the resizer when the image is also bigger than it needs to be.

From our guides

Browse all articles →

JPEG compression how-to How to Batch Compress Images Quickly and Safely Compressing photos one by one is tedious. This guide shows how to batch compress many images at once with consistent settings, full speed, and total privacy. 5 min read Web performance How to Compress Images for a Faster Website in 2026 Unoptimized images are the top cause of slow web pages. This guide shows how to compress and size images for the web to speed up your site and lift SEO. 6 min read Email & upload limits How to Compress a JPEG to Fit Any Email Size Limit Email providers cap attachment size, so big photos bounce. This guide shows how to compress a JPEG under any limit while keeping it sharp and easy to send. 6 min read Quality vs size How to Compress Photos Without Losing Visible Quality You can shrink photos dramatically while keeping them sharp if you know the right techniques. This guide shows how to compress without any visible quality loss. 5 min read Image formats & file size How to Compress PNG Images Without Losing Sharpness PNG files can be surprisingly large. This guide explains how PNG compression works, when to switch formats, and how to shrink graphics while keeping edges crisp. 6 min read JPEG compression how-to How to Compress a JPEG: A Step-by-Step Guide for 2026 Compressing a JPEG keeps the picture sharp while cutting the file size. This guide walks you through the easiest online method and the settings that matter most. 5 min read Quality vs size JPEG Quality vs File Size: Finding the Perfect Balance The JPEG quality slider controls a direct trade-off between sharpness and size. This guide explains how it works and the settings that give you the best of both. 6 min read Image formats & file size How to Reduce Image File Size Without Wrecking Quality Reducing image file size comes down to three levers: compression, dimensions, and format. This guide explains each one and the fastest way to combine them. 6 min read

Frequently asked questions

Is compressjpeg.onl free?

Yes — free, no watermark, no signup.

Which formats can I compress?

JPEG and PNG losslessly or lossily, plus WebP conversion. Photos compress most with JPEG or WebP.

Are uploads private?

Files are processed in an isolated workspace and deleted shortly after download.