Compress PDF for Online Upload Portals

Beyond the size cap, portals commonly reject password-protected PDFs, files with embedded JavaScript, or documents whose page dimensions exceed a limit. Compressing here removes metadata and rebuilds the document structure cleanly, which resolves many silent rejections — but you must remove any password before uploading.

Most identity-document portals ask for 100–300 KB. Start at 200 KB: that reliably keeps a single-page colour ID scan sharp enough for an official to read the details. Only drop to 100 KB if the portal explicitly demands it.

Yes, and this is precisely why the tool is built this way. Identity documents are exactly what you should never upload to an anonymous online converter. Here the file is processed by WebAssembly code inside your browser tab and never transmitted — there is no server that could store or leak it.

Yes. Drop in as many files as you like — they are queued and processed one after another so memory stays under control. Each file gets its own progress bar and download button, plus there is a Download All option.

Text always stays sharp because it remains real vector text rather than an image. Embedded photographs are downsampled and re-encoded, so quality loss scales with how aggressive a preset you choose. Less Compression is visually near-identical to the original.

It depends on the content. Scanned or image-heavy documents commonly shrink by 70–95%. Text-only PDFs that were already optimized may only drop 5–20%, since there is little redundant data left to remove.

Yes, with no file limits, no watermarks and no account. Because processing happens on your device rather than our servers, there is no per-file cost to recover and therefore no reason to meter your usage.

No. Compression runs entirely inside your browser using WebAssembly. Your PDF is read into local memory, processed on your own CPU and written straight back to your downloads folder. No network request ever carries the file.

Both, layered. Structural optimization — removing duplicate objects, dead revisions and metadata — is entirely lossless. Image downsampling and JPEG re-encoding are lossy, which is where the substantial savings come from. Text and vector graphics are never touched by either stage.

It is gone from the page entirely. The document is held only in the tab's volatile memory during processing and is discarded when the tab closes. Nothing is written to browser storage, no cookie records it, and no copy exists anywhere else — your original stays untouched on disk.