PDF Compressor
Shrink a PDF's file size by re-encoding its pages at a chosen quality and resolution. See the size before and after, preview the result, and tune the quality until size and readability balance.
Everything runs locally in your browser. Your data never leaves your device.
Upload
Drop a PDF here
It gets re-encoded at your chosen quality. Click to choose a file.
It never leaves your browser.
Compression
This mode turns every page into a picture of itself. The file gets much smaller, but text stops being selectable and searchable. Use the lossless re-save to keep text intact.
Lower saves more space, higher keeps pages crisper.
100 to 150 DPI reads fine on screens, 300 DPI holds up in print.
Next steps
Send this tool's output straight into another tool.
Hash text or a file with MD5, SHA-1, SHA-256, SHA-512, SHA-3, BLAKE2, BLAKE3, CRC32 and more, all computed live as you type. Compare against an expected checksum and copy any digest.
Verify a checksum online: drop a file, paste the expected checksum and see instantly whether they match. The hash type is detected from the checksum itself, covering MD5, SHA-1, SHA-256, SHA-512, BLAKE3, CRC-32 and more, and sha256sum lines or whole checksum files can be pasted as-is.
Compress text or a file with gzip, deflate, brotli or Zstandard and see the size before and after, the compression ratio and how long it took. One click tries every method and recommends the smallest result.
Decompress gzip, deflate, brotli or Zstandard data from a file or pasted Base64 and read the result as text or download it. Detects the format from the magic bytes where possible, with a manual override.
Inspect any file or text as a hex dump with offsets, byte values and an ASCII column. Jump to an offset, search for bytes or text, select a range to see it decoded as integers and strings, and copy or download the dump.
Combine several PDFs into one or split a PDF into separate files. Reorder pages with drag and drop, see a thumbnail of every page, extract a page range or pick single pages, and download the result.
Render every page of a PDF as an image. Choose PNG or JPEG, set the resolution, pick single pages or a range, then download pages one by one or all at once as a zip.
Shrink a PDF's file size by re-encoding its pages at a chosen quality and resolution. See the size before and after, preview the result, and tune the quality until size and readability balance.
Encrypt any file with a password using AES-256-GCM, or decrypt a file that was encrypted here. Strong key derivation and integrity protection built in.