Compress PDF to 1 MB
The size that clears most email gateways and HR portals, with quality left over for long documents.
Drop a PDF here
or click to browse — target is 1 MB
Files are processed on your device and never uploaded.
Works in your browser. No account needed.
Frequently asked questions
My mail server allows 2 MB. Why compress to 1 MB?
Because attachments do not travel as raw bytes. Mail encodes them in base64, which inflates the payload by about a third, and the stated limit usually applies to the encoded message. A 1.6 MB file can therefore bounce off a 2 MB limit. Leaving headroom is the difference between a delivered application and a silent rejection.
What actually makes a PDF large in the first place?
Images, in almost every case. A photograph pasted at full camera resolution, a logo embedded as a multi-megabyte PNG on each page, or a scan captured at 600 dpi will dominate the file. Text and vector graphics are negligible by comparison — a hundred-page text document is often smaller than a single uncompressed photograph.
How long a document can this handle?
One megabyte covers roughly thirty to forty scanned pages at a readable resolution, since each imaged page carries a floor cost of about 20 to 40 kilobytes. Beyond that the tool reports the smallest size it managed rather than returning something over the limit, and splitting the document becomes the sensible move.
Will the recipient notice the quality drop?
At this target, usually not on screen. One megabyte allows a resolution close to what a display can resolve, so the document reads normally in a PDF viewer. Printing is where the difference shows: a re-rendered page prints softer than the original, so send the uncompressed file when the document is going onto paper.
Are my documents uploaded for processing?
No. The rendering engine runs in your browser, the passes are measured on your device, and the download is produced locally. Nothing is transmitted — which matters for tender submissions and employment paperwork, and is also why a forty-page scan takes a few seconds of your own processor time.
About this tool
One megabyte is the practical ceiling for anything you intend to email. It is comfortably inside the limits of corporate mail gateways, HR systems and tender portals, and it leaves room for the encoding overhead that catches people out: attachments travel base64-encoded, roughly a third larger than the file on disk, and the limit a mail server enforces usually applies to that encoded size. A file that fits on your disk can still bounce.
Getting there is a question of what is inside the document. Text and vector graphics cost almost nothing; images cost everything. A single photograph pasted at camera resolution, a logo embedded as a large PNG on every page, or a scan captured at 600 dpi will account for nearly the whole file. That is why a hundred-page text report is frequently smaller than a two-page document with one photo in it.
For scanned material, this tool re-renders the pages at the highest resolution that still fits the target, deriving that resolution from a real measurement instead of stepping through presets. A megabyte covers roughly thirty to forty scanned pages at a readable resolution; past that, the per-page floor makes the target unreachable and the tool says so rather than handing back an oversized file.
Two things are worth knowing before you send the result. Re-rendering removes selectable text, so keep the original for your own records and for anything that needs to be searched. And a compressed document is optimised for screens rather than paper — if the recipient will print it, send the uncompressed version. Everything here runs locally in your browser, so neither version is ever uploaded.