How to use it
- 1 MB is already selected — just tap “Select PDF” and choose your file.
- Turn on “Black & white” if the document is mostly text: the file gets smaller and the text cleaner.
- Wait while each page is compressed to fit 1 MB — you'll see the progress page by page.
- Check the new size and tap “Download PDF”.
Where a 1 MB limit is common
Many online applications, tax and business registration portals, university admission sites and HR systems accept documents up to 1 MB (some up to 2 MB). Phone scanner apps often produce PDFs of several MB, so even a short document can be over the limit. Check the exact limit in the portal's instructions.
Email is rarely the problem — most email services accept much bigger attachments — but office systems, HR portals and older government sites often still reject anything over 1 MB.
How many KB is 1 MB?
| Way of counting | 1 MB equals |
|---|---|
| Decimal (used by many websites) | 1000 KB = 1,000,000 bytes |
| Binary (used by Windows and many upload checks) | 1024 KB = 1,048,576 bytes |
Because portals differ, ToolDabba keeps your file under 1,000,000 bytes — it passes a 1 MB check whichever way it is counted.
Getting the sharpest 1 MB PDF
- 1 MB gives a 10-page document about 100 KB per page — enough for clear text, even in colour.
- Keep colour on for certificates with seals and photo IDs; use Black & white for long typed documents.
- Need a smaller file for a stricter form? Try 500 KB or 200 KB.
Short documents often end up well under 1 MB
Pages are never rendered above 150 DPI — sharp on any screen and readable when printed. For a short document that already fits comfortably at that resolution, the tool stops there instead of filling the full megabyte, so a two-page certificate may come out at a few hundred KB. That is expected: smaller files upload faster on mobile data and are still under the limit.
For long scans the opposite happens: the tool uses as much of the 1 MB as it can, lowering the resolution only as far as needed to fit every page.