Recommended compression is pre-selected to hit this limit.
The 10-second test: switch off your Wi-Fi (or turn on airplane mode) and use this tool anyway. It keeps working — because there is no server doing the work.
The technical check: open your browser's developer tools, go to the Network tab, and run the tool. Your file is never sent anywhere.
Measured live on this page — files transmitted: 0 · file data sent: 0 bytes
This counter hooks the browser's own networking functions, so it would rise the instant any file data left this page. The only thing this site ever transmits is the contact form, if you choose to send one.
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1 MB is generous, so this page uses Recommended compression rather than anything aggressive. Documents of twenty or thirty scanned pages routinely fit, and quality stays close to the original.
1 MB is a common cap on visa applications, insurance claim portals and older content management systems. It is also a sensible self-imposed ceiling for an emailed report — large enough for a full document, small enough that nobody complains.
If a document is still over 1 MB after compression, it is almost always a long scan at very high resolution. Splitting it into chapters with Split PDF is usually more useful to the recipient anyway. Tighter targets: 500 KB · 300 KB
For scans, roughly twenty to thirty at normal quality. For text-based PDFs, hundreds — text takes up almost no space compared with images.
Barely at this level. Recommended compression targets screen resolution, which still prints well for ordinary documents.
Thanks — we read everything and reply when it matters.