Free browser-based utility

Reduce Image Size to KB or MB

An upload form says your photo must be under 100 KB? Choose the limit, and Doodleden makes the best version of your image that fits, without asking you to understand quality settings or file formats.

Processed locally — your image stays on your device.

Want to choose the quality or format yourself? Use the Image Compressor.

Choose image

PNG, JPEG, WebP, GIF, BMP, TIFF, SVG, AVIF, HEIC or ICO

Drag & drop an image here or You can also paste an image from your clipboard.

Size limit

The largest file the form or website accepts.

Common limits

Keep the file under

Unit

A maximum, not an exact size: Doodleden keeps as much quality as it can while fitting under the limit.

Options

The defaults keep your image's format and dimensions.

Output format

Allow smaller dimensions if needed to reach the limit

Result

Check it before you upload it.

Original

Preview

Reduced

Preview

How to reduce an image to a size limit

Choose, drop or paste an image: JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, AVIF, HEIC (in Safari) or ICO.
Pick the limit the form asks for, such as 100 KB, or type your own in KB, MB, KiB or MiB.
Select Reduce image. Doodleden keeps the format and dimensions and lowers the quality only as far as needed.
If the limit is too small for the image at its full size, turn on Allow smaller dimensions, or choose JPEG, and try again.
Check the result, then download it and upload it to your form.

If your image is already under the limit and you have not changed the format, Doodleden keeps your original file rather than making a lower-quality copy.

Why some limits are hard to reach

A file's size depends mostly on three things: its dimensions in pixels, its format, and its quality setting. Doodleden changes only the quality unless you allow more:

JPEG and WebP are lowered step by step from quality 85, but never below 40, because lower settings usually look noticeably worse.
GIF, and PNG with Allow fewer colours on, use fewer colours instead, but never fewer than 16.
PNG, BMP and TIFF otherwise keep every pixel. PNGs with 256 colours or fewer are saved in a smaller palette form automatically; beyond that, only smaller dimensions make them smaller.

A large phone photo often cannot reach 20 KB or 50 KB at its full size in any format. For limits like these, Allow smaller dimensions is usually needed: Doodleden tries the full size first, then shrinks the picture only as far as necessary, keeping its proportions. If a form also has a minimum size, enter it as the minimum width or height.

When a limit cannot be reached, you still get the smallest version Doodleden made, clearly marked as over the limit, with suggestions.

KB, MB, KiB and MiB

Most upload forms mean decimal units: 1 KB is 1,000 bytes and 1 MB is 1,000,000 bytes, so a 100 KB limit means 100,000 bytes. Some computers show sizes in KiB and MiB instead, where 1 KiB is 1,024 bytes. Doodleden offers both and rounds the limit down to whole bytes, so a result marked under the limit really is under it.

Image to KB or Image Compressor?

Use this page when the size limit is the goal: you know the number a form accepts and want the best image that fits. Use the Image Compressor when you want to choose the quality, colours or format yourself and compare the results. To change the shape, crop or exact dimensions of an image, use the Image Resizer.

Private by design

Your image is read, reduced and saved inside your browser. It is not uploaded to a Doodleden server, and nothing about it is stored.

Files are processed in your browser and are not uploaded to or stored by Doodleden. This site is funded by advertising; our ad partners use cookies and similar technologies as described in our privacy policy.