Compress JPEG

How to compress JPEG online

JPEG quality is a scale from 0 to 100 that controls how aggressively the encoder rounds away fine detail. Cameras and phones save at 90 to 98, which is far more than a screen needs. Re-saving at 75 typically halves the file with no visible change on screen; at 60 the savings grow and slight softness appears in fine textures.

If the photo is going on a website or into an email, limiting its width is just as effective. Most layouts never show an image wider than 1920 pixels, and resizing a 4000 pixel photo to that width removes three quarters of its pixels.

This tool uses your browser's JPEG encoder, so the photo is compressed on your device in about a second and never sent anywhere. Location and camera metadata are removed in the process.

If a form insists on a maximum size, work down in steps: first set the width to 1920 pixels, then try Balanced quality, then Small file. Each step roughly halves the size of a typical phone photo. Stop as soon as the file is under the limit, so you keep as much quality as the limit allows.

Compress JPEG settings explained

When to compress a JPEG

JPEG compression is the usual fix when an upload form rejects a photo as too large, such as visa and job applications, school portals and marketplaces with a 1 or 2 MB limit. It is also how photographers prepare images for the web: the full-resolution originals stay in the archive, and compressed copies go online where they load fast.

Before you compress

JPEGs straight from a camera or phone are saved at very high quality and compress the most. JPEGs that were already optimised by a website or social network compress very little further, and pushing them harder mostly adds artefacts. Always compress from the original photo when you still have it.

How to compress JPEG, step by step

1. Press the Choose button or drag files onto the box. You can add several at once, and they never leave your device.
2. Set the quality to suit where the file is going. The defaults are a good starting point.
3. Press Compress. Images are processed in about a second each.
4. Check the result next to each file: the original size, the new size and the percentage saved. If the settings would make a file bigger, you are told instead of being given a larger file.
5. Press Download to save each compressed file.

What decides how small it gets

Two things decide how much an image shrinks: how many pixels it has and how much fine detail they hold. A 4000 pixel phone photo resized to 1920 pixels keeps less than a quarter of its pixels. After that, quality decides how much fine texture is kept. Photos of skies and walls compress more than photos of foliage, gravel or text, and graphics with flat colour compress most of all.

Is it safe to compress jpeg online?

With most online tools, "online" means your file is uploaded to a company's server, processed there and kept for a while before it is deleted. Here it is not. The page downloads the converter code to your browser, and your file is read and processed inside the tab on your own device. It is never sent to TapToConvert or anyone else.

You can check this yourself: once the page and, for audio and video, the converter engine have loaded, turn off Wi-Fi and the tool still works. That also means there is no queue, no daily limit and no size cap set by a server. The only limit is the memory your browser gives a single tab.