Compress PDF
Shrink PDF file size by re-encoding embedded images.
A PDF full of scanned pages or high-resolution photos can easily balloon past the 25MB attachment limit most email providers enforce, or trip an application portal’s upload cap. Compress PDF shrinks the file by re-encoding the images embedded inside it, cutting file size significantly while keeping the document fully readable. Like every Talzos tool, the compression happens locally in your browser rather than on a remote server.
Why Use This Tool
Server-based compressors need to receive your full, uncompressed file before they can shrink it — meaning the largest, most sensitive version of your document is exactly what gets uploaded. For a scanned tax return, an ID document, or an internal report, that is the opposite of what you want. Talzos compresses the file where it already lives, on your device, so the only version of the document that ever exists outside your browser is the smaller one you choose to download.
How It Works (Expanded)
Upload the PDF you want to shrink and the tool re-encodes the embedded images at a lower, still-readable resolution while leaving the actual text layer untouched — so any text in the document stays sharp and selectable. For documents that are mostly scanned images, you will typically see the largest size reduction; documents that are mostly native text see a smaller reduction because there is less image data to compress in the first place. The resulting file downloads immediately so you can compare the size difference before sending it on.
Common Use Cases
Common scenarios: shrinking a scanned application packet so it fits under a portal’s upload limit, compressing a photo-heavy portfolio PDF before emailing it, reducing a multi-page scanned contract so it attaches cleanly to a message, or bringing a bloated exported report down to a size that is easier to store and share across a team.
How It Works
- 1 Upload your PDF.
- 2 Pick a compression level.
- 3 Click "Compress".
- 4 Download the smaller file.
Frequently Asked Questions
Will compressing make my PDF blurry?
Text stays sharp because only embedded images are re-encoded; very high-resolution scans see the biggest size reduction with minimal visible quality loss.
Is my file uploaded anywhere during compression?
No. Compression happens locally in your browser using JavaScript; the file never leaves your device.
How much smaller will my file get?
It depends on content — image-heavy PDFs often shrink substantially, while text-only PDFs see a smaller reduction since there is less to compress.
Is there a limit on the number of PDFs I can compress?
No. Compress as many files as you need with no daily cap.