Compress PDF to 50 KB

Compress PDF to 50 KB shrinks a one or two page scan under 50 KB by re-rendering it at lower resolution in your browser, with no upload.

Drag and drop, or click to upload a PDF

PDF file · processed on your device, never uploaded

At a glance

Accepts: One PDF file, best a scanned or photo-heavy one
Outputs: A PDF under 50 KB, or the smallest result it could reach
Where it runs: Entirely in your browser, on your device
What leaves your device: Nothing - the file never leaves your device
Limits: Realistic for 1 or 2 scanned pages; stops at 60 DPI to keep text readable; pages are re-rendered as images, so text stops being selectable
Account: Not required - there is no sign-up
Price: Free, with no watermark and no usage cap
Made by: Visrut
Last updated: 8 October 2026

A 50 KB limit is the tightest one you are likely to meet, and it mostly shows up on forms that want a single supporting page: a signed declaration, an ID card scan, a fee receipt or a one-page certificate. That is the case this page is set up for. It opens with "Under 50 KB" already selected, renders each page of your PDF at lower and lower resolution in your browser, and stops at the first result that fits. Nothing is uploaded while it does that.

What fits in 50 KB

Measured on our own test files, generated as 300 DPI A4 scans:

One scanned page (1.9 MB): 48 KB at 72 DPI. Body text is clearly readable.
Two scanned pages (3.9 MB): 47 KB, but only at the last setting, 60 DPI. Readable, with visibly rough edges.
A color ID card scan (1.4 MB): 36 KB at 72 DPI, photo and text both recognisable.
Three pages or more: usually misses. You get the smallest file it could make and a note saying so.

When this is and isn't the right choice

Right choice: a scan or phone photo of one or two pages that a form insists must be under 50 KB.
Wrong choice: a long document. Upload only the page the form asks for: pull it out with Extract PDF Page or Split PDF first, then compress that.
Wrong choice: a PDF exported from Word or Google Docs. It is probably already small, and rasterizing would make it bigger and remove its selectable text.

Tips for getting under 50 KB

Crop away the empty margin and the table around the paper before you make the PDF. Less page area means fewer pixels to store; Crop PDF does it on an existing PDF.
Scan or photograph in good, even light. Shadows and paper texture are detail the JPEG encoder has to keep, and they cost bytes.
Remove blank backs of pages. A blank scanned page still costs a few KB of paper grain.

How to use it

Drag and drop, or click to upload your PDF.
"Under 50 KB" is already selected. Click "Compress PDF".
Check the size it reports and open the download to make sure the text is still readable.

Frequently asked questions

Can any PDF be compressed to 50 KB?

No. 50 KB is enough for one or two scanned pages, not for a long document. In our tests a 300 DPI single-page scan of about 1.9 MB came out at 48 KB, and a two-page scan at 47 KB using the lowest setting. A 10-page scan bottomed out around 240 KB, so it can't reach 50 KB without dropping pages.

Will my document still be readable at 50 KB?

Usually yes for normal printed text, but it is at the edge. To get this small the page is rendered at 60 to 72 DPI with strong JPEG compression, so text looks soft and slightly blocky when you zoom in. Fine print, faint stamps and small handwriting can become hard to read. Open the result and check it before you upload.

The portal says 50 KB. Is a 49 KB file safe?

The tool aims under 50,000 bytes, so the result passes whether the form counts a kilobyte as 1,000 or 1,024 bytes. If the form also asks for a specific file name or page count, check those separately.

Why did my 30 KB text PDF get bigger?

A PDF made from a word processor stores text as text, which is already tiny. Compressing here turns each page into an image, which adds weight. If your file is already under 50 KB you can upload it as it is.