How this page counts 1 MB
Megabytes are counted in more than one way. Some systems treat 1 MB as 1,000,000 bytes, others as 1,048,576 bytes (1,024 × 1,024), and a few use 1,024,000. This page sets the target to 1,000 KB, or 1,000,000 bytes, the smallest of the three, so a file that meets it is under 1 MB on any of them.
The size on the result card is counted in 1,024-byte kilobytes, the way Windows File Explorer shows sizes, so a file that only just fits appears as up to about 977 KB. A Mac counts in thousands, so Finder may show the same file as 1 MB. Both describe the same file. If a portal still rejects it, type a slightly lower target such as 950 and compress again.
Long documents that hit a 1 MB limit
1 MB is generous for a single page and tight for a long document, so it tends to apply to files that run to many pages:
- Bank statements covering several months, often requested as proof of funds or income with visa, loan and admission applications
- Full academic records: a degree with every semester's transcript, plus equivalence or verification letters
- Property and address documents, such as a tenancy agreement, a sale deed or a run of utility bills
- Medical reports and employment records gathered into one file
- Application forms with annexures: the form itself followed by copies of every supporting document
It helps to know which kind of PDF you have. A statement downloaded from online banking is digital: mostly text, which takes up very little space, so if it's over 1 MB the cause is usually the page count or heavy images such as logos and background artwork. A statement the bank printed and stamped, which you then scanned, is a set of pictures, and pictures are where the size comes from.
How many pages fit in 1 MB?
The compressor first recompresses the images inside the PDF and keeps the text. If that isn't enough, it rebuilds every page as a picture at one shared DPI, starting at 150 and stepping down until the file fits. This rough guide is for dense A4 pages, such as statement tables or typed transcripts. Lighter pages come out sharper, and pages full of colour photographs come out softer.
| Pages | Budget per page | Likely DPI | What to expect |
|---|---|---|---|
| 1–2 | 500 KB or more | 150 | The sharpest setting the tool uses: crisp throughout |
| 3–4 | 250–330 KB | Around 120 | Sharp, including small print and stamps |
| 5–6 | 165–200 KB | Around 100 | Clear for normal print; check the smallest figures |
| 8–10 | 100–125 KB | Around 85 | Readable at normal zoom; fine print softens |
| 12–15 | 65–85 KB | 60–72 | Fine on screen, but zoom into amounts and dates before uploading |
| 20–30 | 33–50 KB | 50–60 | A last resort: small print may be unreadable |
| More than 30 | Under 33 KB | May not fit | Split the document or upload only the pages needed |
This table only applies when pages are rebuilt as images. Many digital PDFs, even long ones, reach 1 MB with the image passes alone, and then the result card shows text kept selectable with no DPI at all. When it does show a DPI, use the table to decide whether to accept the result or split the file first.
Bank statements: passwords and digital signatures
Password-protected statements
Many banks send e-statements that need a password to open. This tool can't compress a file like that: you'll see a message asking you to unlock it first. Open it with its password in your browser or PDF reader, choose Print, pick Save as PDF as the printer, and add the saved copy here. If the reader won't let you print it, you'll need a copy without a password from wherever the file came from.
Some PDFs open without a password but have editing restricted. The compressor can't recompress the images inside those, so it goes straight to rebuilding the pages as images. The result will look right, but its text won't be selectable.
Digitally signed PDFs
Some statements, e-certificates and verification letters carry a digital signature that a PDF reader can check. This tool rewrites the file when it compresses it, so that check will fail afterwards, and when pages are rebuilt as images the signature is removed altogether. If the organisation receiving the document needs to verify the signature, upload the original, or ask them how they want large signed files sent. A stamp or handwritten signature on a scan isn't affected: it's part of the picture and stays visible.
Splitting a long PDF into parts under 1 MB
When a document is too long to stay readable in 1 MB and the form lets you add more than one file, split it and compress each part separately. Halving the pages doubles the budget for every page that's left. Split PDF offers three useful ways to do it:
- Every N pages cuts the file into equal parts. A 24-page statement split at 12 pages per file gives two parts with about 83 KB a page each, instead of about 42 KB in a single file.
- Custom ranges splits along natural boundaries, such as one file per semester or per quarter. Type the ranges, for example 1-6, 7-12.
- Extract pages keeps only the pages you pick, for when a form needs just the summary page or the first and last page of a statement.
Give the parts names that show their order, such as statement-part-1 and statement-part-2, so whoever reviews them reads them in sequence.
Going the other way, if the form wants one file under 1 MB, combine everything with Merge PDF first and then compress the merged file here. Pages that started life as phone photos come out cleaner if you rebuild them with JPG to PDF before merging.
Big files, processed on your own device
Because nothing is uploaded, all the work happens on your phone or computer. That keeps statements and property papers private, but a long scan takes time: the tool may build the document more than once at different DPI settings before it settles on the sharpest one that fits. A progress bar shows each pass, so keep the tab open until it finishes. Older phones are slower than laptops for files with dozens of pages, and a PDF over about 150 MB shows a warning that compression may take a while.
There's no sign-up, no watermark and no limit on how many files you compress. When you're done, the compressed copy and your original are both still only on your device, until you choose to upload one.