Compress PDF
Reduce a PDF's file size while keeping acceptable quality.
Drag & drop your files here
or pick from your device
Supported formats: PDF
How to use
- 1
Upload the PDF file you want to compress.
- 2
Click "Compress" and wait for processing to finish.
- 3
Download the smaller file.
About the Compress PDF tool
"File exceeds the maximum size" — a message familiar to anyone who's tried emailing a PDF or uploading it to a government portal or application platform. This tool compresses your file with a professional processing engine that shrinks embedded images, redundant data, and duplicated fonts, cutting size noticeably while text stays perfectly sharp.
The compression ratio depends on the file's content: scanned, image-heavy documents can shrink to less than half their size, while pure-text files drop less because they're small to begin with. And unlike popular compression sites that upload your documents to their servers, the engine here runs locally inside your browser — your sensitive files never leave your device.
When do you need this tool?
Fitting email attachment limits
Compress a report or deck to fit the usual 10-25 MB email cap instead of splitting it or resorting to a cloud link.
Uploading to official portals
Job, university, and government portals enforce strict size limits — get your documents accepted on the first try.
Smarter, smaller archives
Compress old invoice and contract archives to reclaim significant storage while keeping them perfectly readable and printable.
Why ToolsRio?
Real privacy
All processing happens inside your browser. Your files are never uploaded to any server, and nobody can see them — not even us.
Free without limits
No watermark, no file-count limits, and no hidden paid tiers.
Instant speed
No waiting for uploads and downloads to a remote server — processing starts immediately on your device.
No sign-up
No account, no email, no annoying ads. Open the tool and use it right away.
Frequently asked questions
How much can the file size shrink?+
The reduction depends on the file's content; files with large images shrink more than purely text-based files.
Does compression affect text quality?+
No, text stays sharp and clear; compression mainly targets images and redundant data inside the file.
Is my file uploaded to any server while compressing?+
No, processing happens entirely in your browser through a compression engine that runs locally on your device.