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Image requirement guide

Compress an image to 100 KB

A 100 KB cap is a practical default for profile, ID, and document images. The final result shows the measured size instead of relying on an estimate.

A useful default for photos and document uploads

One hundred kilobytes is often enough for a readable small photo when the canvas is sensible. The preset gives the encoder more room than the stricter limits, then validates the final output instead of estimating from the source file size.

Separate the pixel requirement from the byte requirement

A file can be under 100 KB and still be rejected because its dimensions are wrong. If the destination specifies both, enter both values. The result card shows the exact output pixels alongside the measured bytes so the two checks are easy to compare.

Questions people ask

Is 100 KB an official universal limit?

No. It is a convenience preset, not a promise about every form. Use the destination’s own instructions as the source of truth.

What happens when the output is below a minimum?

Set a minimum KB value as well as a maximum. The result is marked as needing attention if it falls outside that range.

How to use this tool

The 100 KB page is a named shortcut for a JPEG result capped at 100 × 1024 bytes. After encoding, Aftermath validates the real file size and reports pass or fail. With no fixed pixel target, the processor may reduce dimensions only after quality search cannot meet the cap. This route answers a literal 100 KB requirement; the general adjustable-maximum page is better when the ceiling must be changed.

What to choose and what you get

What to choose

  • one supported local image

Result

  • a separate processed image copy or local measurement report

Supported use

  • One or more verified raster files that need the route's preselected 100 KB maximum and JPEG output.
  • Measured per-file results with quality search and optional proportional downscaling when pixels are not fixed.

Before you start

  • This named shortcut does not require the file to consume all 100 KB and does not validate external content rules.
  • It cannot simultaneously promise exact source dimensions and automatic dimension reduction when the byte budget is missed.

Supported formats

  • Accepted formats: JPG, PNG, WebP, HEIC, AVIF, GIF, BMP.
  • Output formats: JPG, PNG, WebP.

Browser support and permissions

  • Modern browser with JavaScript, a supported image decoder, and enough memory for the selected image.
  • No camera, microphone, or screen permission is needed.

Choose the right settings

  • Open this page when a form or workflow names a 100 KB maximum directly.
  • Open /resize-image-to-exact-kb when the value is editable or unknown before the task begins.
  • Choose 200 KB for more retained detail when permitted, or 50 KB when the published limit is stricter.

Worked example

A profile photograph needs a JPEG copy no larger than 100 KB for a stated upload requirement.

Starting facts

  • The source exceeds 100 KB.
  • The destination did not prescribe a separate exact canvas.

Observed operation: Search JPEG quality locally and reduce dimensions only if encoding quality alone cannot pass the 100 × 1024-byte limit.

Review the result: Read the actual result bytes, reopen the preview and compare important detail before downloading the separate copy.

Boundary: A measured 100 KB pass cannot certify subject content, minimum quality or acceptance by an external upload service.

What you can do

Keep a profile, ID, or document image within a named 100 KB JPEG maximum and inspect the measured bytes.

If it does not work

  • The encoded candidate can exceed 100 KB after all bounded attempts, in which case validation remains failed.
  • Choosing PNG bypasses lossy quality tuning and can leave a detailed image over the preset ceiling.
  • A smaller measured file can still be visually unacceptable after compression or resizing even though the byte rule passes.

Things to know

  • The measured result still needs review against the intended destination or use.

Privacy boundary

The selected image stays in the current browser session and is not sent to an Aftermath processing service. How local processing is verified.

What this tool verifies

Checks the displayed limits and reports or creates a separate processed image copy or local measurement report from one supported local image.

Check before sharing

A local measurement or export does not guarantee acceptance by an external destination.

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