Compress PDF to a Target Size

Choose an exact upload-size target and progressively compress a scanned PDF until it fits, with a before-and-after size check.

Drop your file here

Or choose a file from your device.

Target size (MB)

Pages are rebuilt as images to reach the target. Text search, links and form fields may be removed.

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Your file is not uploaded to our server

This task runs inside your current browser. Supported files stay on your device.

MEASURED EVIDENCE

Tested in FileChak

These are measured FileChak browser results from three public-safe synthetic PDFs. No personal or institutional documents were used.

Text and chart document

1.8MBat or below 1MB723KB

8 pages → 8 pages · saved result 723KB

checkedPage countThe page count was preserved.
checkedBody text and chartBody text, chart lines and markers were readable.
caution6pt small textSmall notes became softer and should be compared with the original.

Phone scan document

7.1MBat or below 1MB765KB

4 pages → 4 pages · saved result 765KB

checkedBody text and table linesKorean body text and table lines were visible.
checkedRed SAMPLE stampThe stamp outline and letters remained visible.
checkedPage countThe page count was preserved.

QR, stamp and image document

3.8MBat or below 1MB238KB

3 pages → 3 pages · saved result 238KB

cautionQR patternThe QR pattern remained visible, but it should be scanned separately after compression.
checkedStamp and imageThe main outlines of the red stamp and image remained visible.
cautionSmall textSmaller notes had lower clarity in the result.

Before you save

Pages are rebuilt as images, so searchable text, links and form fields may be removed.
QR codes should be checked separately after strong compression.
Results vary by PDF structure and browser. A target size cannot be guaranteed for every PDF; open the saved file before submitting it.

Last measured test: 2026-08-29 · Codex In-app Browser (Chromium, version not exposed) · Microsoft Windows NT 10.0.26200.0

HOW IT WORKS

From file selection to download

1Choose a fileSelect a document or image from your device.
2Adjust optionsSet pages, size, format or output quality.
3Save or shareDownload the result or use your device share menu.

PRACTICAL GUIDE

When to use Compress PDF to a Target Size

Choose an exact upload-size target and progressively compress a scanned PDF until it fits, with a before-and-after size check. No software installation or account is required.

Good for

An upload form has a strict limit
A scanned PDF is too large for email
You need a predictable final size

Check before saving

Small text may lose clarity
Searchable text can become an image
Check QR codes and stamps