Skip to content
TabBench

Compress Image

Compress image to exact target KB (e.g. under 50KB, 100KB, 200KB) with live quality adaptation and alerts.

Runs in your browser. Nothing you add is uploaded.

What the Compress Image does

Large images are the single biggest cause of slow pages and rejected uploads. Compressing an image trades a small amount of visual fidelity for a large reduction in file size, and for photographs the trade is usually invisible — a 4 MB phone photo commonly drops below 400 KB with no difference you can see at normal viewing size. This compressor uses the browser's own canvas encoder, so your images are never uploaded anywhere.

How to compress an image

  1. Select or drag in your image. JPEG, PNG, and WebP inputs are all supported.
  2. Set a target — either a quality level or a maximum file size such as 50 KB, 100 KB, or 200 KB.
  3. Optionally reduce the pixel dimensions. This is usually the largest single saving, since a 4000px-wide photo displayed at 800px is carrying 25 times the pixels it needs.
  4. Compare the preview against the original at full size, then download the result.

The Compress Image runs entirely in your browser — nothing you enter is uploaded, stored, or logged.

When to use it

Meeting a strict upload limit

Application portals, exam registrations, and government forms frequently cap photographs at 50 KB or 100 KB. Targeting the size directly gets you under the limit without repeated trial and error.

Speeding up a website

Images typically account for most of a page's transferred bytes. Compressing them is the highest-leverage change available for Largest Contentful Paint, which is a direct Google ranking signal.

Attaching photos to email

Most mail servers reject attachments over 20–25 MB. Compressing a set of photos usually brings a whole batch comfortably under the limit in one pass.

Good to know

  • Resize before you compress. Cutting dimensions in half removes three-quarters of the pixels and dwarfs anything quality settings alone will achieve.
  • JPEG quality 80 is the usual sweet spot for photographs — below about 60, blocking artefacts become visible around edges.
  • PNG is lossless and suits screenshots, logos, and line art. Photographs saved as PNG are typically several times larger than they need to be.
  • Compression is not reversible. Keep your originals, and never re-compress an already-compressed file repeatedly.

Guides that use this tool

Frequently asked questions

Can I compress an image to under 50 KB or 100 KB?

Yes! Enter your desired target size in KB and our algorithm will automatically balance quality and resolution to meet your limit.

How do I compress an image to exactly 50 KB?

Set 50 KB as the target size and let the tool search for the quality level that lands under it. If the result looks poor, reduce the pixel dimensions first — at a smaller size, far less aggressive compression is needed to hit the same byte count.

Will compressing reduce the visible quality?

Some quality is always discarded, but at moderate settings the loss is imperceptible at normal viewing sizes. Photographs tolerate this well. Screenshots, text, and sharp-edged graphics show artefacts much sooner, so use PNG or a high quality setting for those.

Are my images uploaded to a server?

No. The file is read into your browser, drawn to a canvas, and re-encoded locally. Nothing is transmitted, which makes this usable for identity documents, medical images, and anything else you would not upload to an unknown service.

Why is my PNG barely getting smaller?

PNG uses lossless compression, so there is a hard floor on how far it can shrink. If the image is a photograph, converting it to JPEG or WebP will reduce it dramatically. If it needs transparency, WebP keeps the alpha channel while compressing far better than PNG.

Does compressing strip EXIF metadata?

Yes. Re-encoding through canvas discards EXIF, which removes GPS coordinates, camera model, and timestamps. That is a privacy benefit when sharing photos publicly, but worth knowing if you rely on that metadata.

Related tools