Kilomill

Kilomill Compress to 100 KB

Compress or resize an image to 100 KB

100 KB is enough for a clear photo or a readable one-page document scan, if the image is sized sensibly. Kilomill finds the highest quality that fits and only reduces the dimensions when necessary.

  • No upload: runs in your browser
  • Batch + ZIP download
  • No sign-up, no watermark

Drop images to get them under 100 KB

or paste from the clipboard · JPG, PNG, WebP, AVIF, HEIC, GIF, BMP · no upload

Output format
File size

For JPG, WebP and AVIF. 70–80 is hard to tell from the original. PNG uses smart colour reduction instead (see Advanced).

KB
KB

Aims at or below the maximum counting 1 KB = 1,000 bytes, so the file passes whether a site counts 1,000 or 1,024 bytes per KB.

Dimensions

Leave one box empty to keep the proportions.

%
px
Advanced
PNG output
dpi

Metadata (EXIF, GPS location, camera details) is removed from every output file.

How to get an image under 100 KB

  1. Add the image. The limit is already set to 100 KB and the output to JPG, the format forms accept most often.
  2. Set the dimensions if the form specifies them (for example 600 × 600 pixels) under Dimensions. Otherwise leave them: Kilomill shrinks the image only if quality alone can’t reach the limit.
  3. Check the result. Each image shows its exact size in bytes and the quality used. Compare lets you zoom in to make sure faces and text are still clear.
  4. Download and upload it to the form.

Photos vs documents at 100 KB

  • Photos: 100 KB is usually enough to keep a face sharp at the pixel sizes forms ask for.
  • Scanned or photographed documents: crop away the table or desk around the page and make sure it is evenly lit. Text needs enough pixels to stay readable; if the result is blurry, allow a slightly larger limit if the form permits, or split multi-page documents.
  • Phone photos (HEIC): add them directly; they are converted to JPG on the way.

Need a PDF under 100 KB instead? Use compress PDF to 100 KB on our sister site.

Official upload limits around 100 KB

A few published requirements, taken from the organisations’ own pages. Rules change and differ per application, so always check the instructions of the form you are filling in.

UploadRequirementSource
JEE (Main) / NEET (UG) 2026: signatureJPG, 10–100 KBNTA information bulletins, read 21 Oct 2026
IBPS PO/MT-XVI: handwritten declarationJPG, 50–100 KB; 800 × 400 px at 200 DPIIBPS CRP PO/MT-XVI notification, read 21 Oct 2026
Australian citizenship application, online photoJPEG between 70 KB and 3.5 MB; 1200 × 1600 px preferredDepartment of Home Affairs, read 21 Oct 2026

Questions and answers

Is 1 KB 1,000 or 1,024 bytes?

It depends on who you ask: Windows counts 1,024 bytes, macOS and most standards 1,000. Kilomill aims at or below the limit counted as 1,000 bytes per KB, which also passes if the site counts 1,024. For a minimum it does the opposite, so the file passes either way.

What if it can’t reach the size?

With “Keep width and height” ticked, quality alone sometimes isn’t enough; untick it to let Kilomill also reduce the dimensions. If the result is still too large, the image shows a warning and gives you the smallest version it found.

The form also has a minimum size. Can you meet it?

Yes: enter it as the minimum. Kilomill first raises the quality; if the image is still too small at the highest quality, it adds a harmless comment block inside the JPG file to reach the minimum. The picture itself is not changed.

What happens to EXIF data and GPS location?

Every output file is re-encoded from the pixels, so EXIF metadata such as GPS location, camera model and capture time is not copied into it. The photo is turned upright first, so removing the orientation tag does not leave it sideways.

Are my images uploaded to a server?

No. The images are read and compressed by code running in this browser tab, and the results are created in your device’s memory. Nothing is sent anywhere, which you can confirm in your browser’s developer tools (Network tab) while you work. See Privacy.

Related tools

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