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Actually Free: Compress PDF to Under 100 KB

Reduce a PDF to under 100 KB free for application and exam portals. Finds the sharpest quality that fits; grayscale option for scans. No upload.

What it does

To compress a PDF to under 100 KB for free, drop it here: the 100 KB limit is already selected. ActuallyFreeTools tries progressively smaller settings and keeps the sharpest version that fits. For multi-page scans, tick Grayscale — colour is often what pushes files over the limit. The file never leaves your device.

How to use it

  1. Drop the PDF — “Must be under 100 KB” is preselected.
  2. Tick Grayscale for scanned forms and ID copies.
  3. Compress and download the file under 100 KB.

Questions people ask

Why do portals ask for under 100 KB?

Many government, exam and job portals cap uploads tightly to save storage. Scanned certificates and IDs are usually far larger.

What if it cannot reach 100 KB?

Tick Grayscale, or split the document and upload pages separately if the portal allows.

Will it still be readable?

It keeps the highest resolution that fits; one or two pages at 100 KB stay readable.

Is Compress PDF on ActuallyFreeTools really free?

Yes. There is no sign-up, no daily limit, no watermark and no paid tier. Nothing is held back for paying users.

Are my files uploaded anywhere?

No. Compress PDF runs inside your browser, so your files are processed on your own device and never sent to a server. That is also why there is nothing to meter or charge for.

Related tools

Compress PDF to 200 KBShrink a PDF, or hit an exact size — even 100 KB.Compress PDFShrink a PDF, or hit an exact size — even 100 KB.Grayscale PDFConvert a colour PDF to black and white.Document scannerPhone photos → straightened, clean PDF scans.

Last updated 30 October 2026. ActuallyFreeTools tools run entirely in your browser.