Compress Image to 5 KB

Squeeze an image down to 5 KB — small enough for favicons, inline email logos, and the strictest legacy upload forms.

Supports JPEG, PNG, WebP, GIF, BMP and more — up to 50 MB

How to compress an image to 5 KB.

The target is preset, so this takes three steps — plus what to expect at 5 KB.

1
Step 1

Upload your image

Click upload or drag and drop any JPEG, PNG, WebP, SVG, or GIF file from your device.

2
Step 2

Target is already set to 5 KB

This page is preset to 5 KB, so there is nothing to type. Choose JPEG or WebP output for the most efficient result at this size.

3
Step 3

Compare, then download

Press compress and check the result against your original in the slider. Roughly 320 × 320 px is the realistic pixel budget at 5 KB — download when it looks right.

Getting the best results

Crop to a square first

Almost everything that needs 5 KB is displayed as a small square or circle. Cropping to that shape before compressing removes pixels you were never going to show, and every pixel removed is budget returned to the ones that remain.

Try PNG for flat graphics

The usual advice is to prefer JPEG, but at 5 KB a two-colour logo often comes out cleaner as a palette PNG than as a JPEG, because JPEG spends its budget smoothing edges that should stay sharp.

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Compressing an image to 5 KB.

What 5 KB is actually for, what it can hold, and how to get there without wasting quality.

What 5 KB is good for

5 KB is close to the practical floor for a recognisable image. At this size you are working with a budget of about 40,000 bytes of actual picture data, which is enough for a small square icon or a simple logo but not for a photograph at any meaningful resolution.

That constraint is the point rather than a problem. The things that genuinely need 5 KB — favicons, avatars in a comment thread, a logo embedded in an email signature — are all small on screen anyway, so nobody ever sees the detail you gave up.

Where this size is required

Favicons and site icons, tiny forum or comment avatars, logos embedded in HTML email signatures where total message weight matters, and a handful of older government or banking portals that still enforce a 5 KB ceiling on scanned signatures.

What to expect at 5 KB

A photograph will not survive intact at 5 KB. Expect to land around 320 × 320 pixels before compression artefacts become obvious, and considerably less for anything with fine texture or small text. Flat graphics, line art, and logos fare far better because there is less detail to discard in the first place.

Frequently asked questions.

Everything you need to know about compressing images to 5 KB.

Almost never. Identity photo requirements usually sit between 20 KB and 50 KB precisely because faces need more detail than 5 KB allows. Check the form again — if it really says 5 KB, it is likely referring to a signature scan rather than a photograph.

JPEG compression softens hard edges first, which is exactly the wrong trade for a logo. Switch the output to PNG and reduce the colour count instead; text and outlines stay crisp and the file often lands smaller.

A 4 MB phone photo has to lose about 99.9% of its data, which is only possible by cutting the dimensions hard as well. Expect a small square rather than a recognisable full-frame photograph.

A screenshot of a small interface element, yes. A full-screen capture containing text will be unreadable at 5 KB — crop to the region that matters first, which is usually all anyone needed anyway.

Yes, and deliberately so. A typical site logo is 5–20 KB, so this target sits at the efficient end. An SVG is often smaller still and stays sharp at any size, if the destination accepts one.

For a photographic JPEG, roughly 320 × 320 px is the practical ceiling before compression becomes visible. Flat graphics, screenshots, and document scans do considerably better, because they contain less fine detail to preserve.

No. Images are processed on our secure server only to perform the compression and are deleted immediately after your download. They are never stored, shared, or accessed by anyone.