Resize an image to 100 KB

A 100 KB limit is a middle ground: enough for a clear photo at modest dimensions or a legible scan of a single page.

Quick answer: Choose your image, keep the target at 100 KB, and download a version at or just under 100 KB. Nothing is uploaded.

1. Add images
2. Choose settings
3. Download

Choose imagesor drop them here, or paste with Ctrl+V. Up to 40 at once. They stay on your device.

Output format

JPGWebPPNG

How to shrink

Exact size (KB)Quality

Target size (KB)

Resize (optional)

Max width (px)

Max height (px)

Leave blank to keep the original size. Images are scaled to fit and are never enlarged.

Your settingsChanging any option re-compresses your images automatically.

Files processed0

Total saved0 B

Average reduction0%

Original to result-

How to resize an image to 100 KB

1. Choose your image. Click the box or drop a JPG, PNG or WebP file onto it. It opens inside your browser and is not uploaded.
2. Check the target. It is set to 100 KB. Aim a little below the limit on your form, because some systems count 1 KB as 1,000 bytes.
3. Compress and compare. The tool finds the highest quality that fits. Drag the comparison slider to see what changed.
4. Download and check. Open the saved file at full size before you upload it, especially if it contains text or a face.

What fits in 100 KB

A decent-quality portrait, a clear single-page document scan, or a web banner.

As a rough guide, 100 KB holds about 682,667 pixels at moderate JPEG quality. Real files vary with how detailed the picture is, so treat these as estimates:

Photos at 100 KB

A hundred kilobytes holds about 680,000 pixels at moderate quality, so roughly 830 by 830 pixels or a 4:3 picture of about 950 by 710 pixels. Faces keep their skin tones well at this size, and the first things to cost bytes are busy backgrounds and fine texture such as foliage or fabric.

If your original is a large phone photo, the tool will reduce its pixel dimensions by a few times. Check the dimensions shown in the result panel against any minimum the form asks for.

Document scans at 100 KB

A single page of text can fit in 100 KB if it is scanned in black and white or grayscale at a moderate resolution. A colour scan of a full page, with a photo or a stamp, often needs more.

Scan the page flat, in even light, and crop to the page edges. After compressing, use the comparison slider and zoom in on small print. If it is soft, scan again at a lower resolution rather than lowering the quality, which tends to smear text.

Web images at 100 KB

For web pages, 100 KB is a sensible budget for a hero image or banner. Choose WebP output if the site accepts it: it is usually smaller than JPG at similar visual quality.

Keep a copy of the original. Compression discards detail permanently, so you cannot recover it later from the compressed file.

Tips for 100 KB

• For text documents, black-and-white or grayscale scans usually fit 100 KB at a readable size; colour scans of full pages often do not.
• If text looks soft, raise the target a little or scan at a lower resolution rather than lowering quality further.
• Portraits keep skin tones well at this size; busy backgrounds are the first thing to cost bytes.
• Use JPG for forms and WebP for your own web pages.

If something goes wrong

• Text is fuzzy: scan at a lower resolution, or crop out empty margins so more of the file budget goes to the text.
• Colours look flat: the tool lowered quality to fit; try a smaller crop or a higher target.
• The result is under 100 KB by a wide margin: the original was already small; use your original instead.
• Another program reports a different size: it may count 1 KB as 1,000 bytes; set a slightly lower target.

JPG, WebP or PNG?

JPG is accepted almost everywhere and is the safe choice for forms. WebP is usually smaller at the same visual quality but some upload portals reject it. PNG keeps sharp edges for screenshots and logos, but it is rarely small enough for a strict KB limit, which is why this tool outputs JPG or WebP.

The limit on your form may differ from 100 KB. Use the number the form states, and leave a little margin below it.

Need a different limit? Use the image compressor with any size. For passport or ID photos, set the dimensions first with the photo size tool.

Other sizes

20 KB · 50 KB · 200 KB · 500 KB

Last reviewed 2026-10-21.