Check PDF File Size

Before you upload anything to a form with a size limit, it helps to know the exact number, not a rounded figure from your file manager. This tool reads the size of each file you select, shows it in bytes and KB, counts pages in PDFs, and tells you whether the file is under or over the limit you choose. Nothing is uploaded; the check happens in your browser.

What the checker shows

You can select one file or several at once, mixing PDFs and images. For each file you get:

• The exact size in bytes, for example 187,402 bytes.
• The size in KB, where 1 KB is 1000 bytes.
• The page count, for PDFs.
• A verdict against your chosen limit: under the limit or over the limit, with the exact difference.

Limits can be set to 100 KB, 200 KB, 500 KB, 1 MB or 2 MB, or to any custom KB value. If a file is over, the result links straight to the compress tools so you can fix it.

Why your file manager shows a different number

Sizes are counted in two ways. Some systems treat 1 KB as 1000 bytes, while others, including some operating systems, use 1024 bytes. The gap is 2.4%, which is small but enough to matter when a file sits right at the edge of a limit.

A file of 204,800 bytes is "200 KB" to one system and "204.8 KB" to another, so it could pass one portal and fail the next. That is why Dokurapi's compressors aim for 6% below the target: the margin is larger than the 2.4% difference, so their output passes either way.

When to run a check

1. Before uploading, to avoid a failed submission near a deadline.
2. After using another app to scan or export a document, since sizes vary a lot between apps.
3. After merging PDFs, because the combined file can exceed a limit even when each part was fine.
4. When a form lists different limits for different slots, so you can test each file against its own limit.

If a file is over the limit

Use the link in the result to open a compressor, or go directly to the 200 KB PDF compressor or a matching preset. For a file that is only slightly over, compressing to the exact limit is usually enough. For one that is several times over, consider removing pages first. The receiving portal's current instruction is the final authority on its limits and on how it measures them.