Compress PDF documents to under 300 KB
Fit supporting documents, identity proofs, and application forms under 300 KB. High visual quality with 100% client-side privacy.
How it works
Open your PDF
Document is loaded directly into browser memory.
Target limit: 300 KB
Engine calibrates compression to produce the clearest output under 300 KB.
Compress
Fast local calculation on your own device.
The document is read locally
A PDF often carries more than its pages — names, contract terms, bank details. Here the document is opened by your browser, changed in place, and saved back to you. There is no upload step, so there is no copy anywhere else.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so nothing is ever attached to an identity.
- No tracking of what you worked on or what was inside the file.
There is no queue, no waiting room and no retention policy to read. The document is released the moment the tab closes. The how it works page explains why nothing leaves your device, and our verification guide shows how to check with your network off.
What people use it for
Sharing one section of a long document
Nobody needs all two hundred pages when they asked for the summary. Send only what was requested.
Getting paperwork through email
Mail servers reject large attachments outright. A smaller document avoids the bounced message.
Preparing a document for print
Printers and copy shops accept a clean, correctly sized file far more readily than a folder of images.
Formats & limits
What this tool accepts, what it produces, and what it will never ask you for.
- Input
- A single PDF document
- Output
- A compressed PDF under your target size
- Maximum file size
- Set by your device, not by a plan
- Files per run
- Several at once
- Sign-up required
- None
- Watermark
- Never added
- Works offline
- Yes, once the page has loaded
- Supported browsers
- Any current Chrome, Edge, Firefox or Safari
When something goes wrong
Encrypted and damaged documents stop with a plain message rather than a spinner that never finishes. If a PDF opens in your reader it will normally open here.
The file is either encrypted or damaged. Remove the password first, then try again.
Why not an upload site
An upload-based PDF tool sends the whole document to a server, does the work there, and sends it back. Removing that round trip removes the waiting, the caps and the copy.
A typical upload site
This tool
Questions
Why compress to 300 KB?
300 KB is a common middle ground for banking verification portals and official registrations that reject heavy files.
Will embedded images remain readable?
Yes. Color and contrast are preserved so stamps, signatures, and IDs remain legible.
Does this work offline?
Yes. Once this page is loaded, you can disconnect from the internet and compress documents offline.
Is there a file size limit?
No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.
Does it work without an internet connection?
Yes, once the page has loaded. Nothing is fetched while you work, so a dropped connection does not interrupt a run.
Do I need an account or an email address?
No. There is nothing to sign up for, and nothing is ever attached to an identity because no file leaves your device.