Image resizer in KB

Choose a file-size limit, then download a photo that fits it. Add exact pixel dimensions if your form needs them.

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Image resizer in KB processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Choose an image

Still JPG, PNG or WebP · up to 20 MB

Maximum file size

Size unit

Form requirements and format

Minimum file size (same unit, optional)

Use exact pixel dimensions Allow smaller dimensions to meet the limit

Fit at the chosen dimensions

Output format

Border / JPG background

Fit keeps the whole picture. Crop cuts off edges. Borders and JPG transparency use the background color. Enlarging does not restore detail.

Your download preview

Preparing the example…

Example image · 640 × 360 pixels

Your image is processed in browser memory. It is never uploaded or saved by this tool. Download saves it to your device. EXIF metadata, including location, is removed from the output.

Check small text and faces in the preview. Meeting these sizes does not guarantee a form will accept the photo.

Images may have up to 16 million pixels, with each side up to 8192 pixels. Animated images, SVG, GIF, HEIC and documents are not supported.

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-10-04

Fit the size your form asks for

Enter the maximum file size and choose KB or KiB. A KB is 1,000 bytes; a KiB is 1,024 bytes. The displayed byte count comes from the actual download. A 50 KB limit means no more than 50,000 bytes, not exactly that many bytes.

For a form that needs both a file-size range and fixed dimensions, open Form requirements and format. Enter its minimum, width and height. Fit adds borders; Crop fills the box by cutting off edges. Exact dimensions are never reduced to meet the size limit.

The tool tries JPEG or WebP quality settings before reducing dimensions, if you allow it. PNG has no quality slider. An unreachable range produces an explanation instead of a download. Preview small text and faces before submitting.

Next: Image resizer

A worked example

For a maximum of 20 KB, the exported file must be at most 20,000 bytes. If the form also asks for 200 × 230 pixels, turn on exact dimensions and enter those values. These are example settings, not requirements from a particular form.

Before you use the result

Still JPEG, PNG and WebP only, up to 20 MB (20,000,000 bytes), 16 million pixels and 8192 pixels per side. SVG, GIF, HEIC, documents and animations are rejected. EXIF metadata, including location, is removed. Files are processed on your device and are not uploaded or saved by this tool. Browser encoding may change colors. Increasing dimensions does not add detail. No padding bytes or guarantee of form acceptance.

Next: Image cropper

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ToolOctopus. “Image resizer in KB.” Updated 2026-10-04. https://tooloctopus.com/resize-image-in-kb.

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