Compress PDF

A PDF is a bundle of streams: text, fonts, images, and the objects that tie them together. Many PDFs — especially exports from Word, scanners, design tools, and "Print to PDF" — store those streams inefficiently, leave duplicate objects behind, or never deflate their content at all. Filevo opens the file, deflate-compresses every stream, recompresses embedded images and fonts, and deduplicates the object table. The page content is identical; only the wasted bytes are gone.

The size you save depends entirely on how much waste the file carried. A "Print to PDF" document with uncompressed streams can shrink substantially; a scanner export with redundant objects often drops too. The honest part most tools skip: Filevo does not downsample image resolution, so it will not crush a high-resolution scan down to a blurry thumbnail to hit a target size. That keeps your document sharp.

Lossless cleanup pays off most on files that were never optimised in the first place. The biggest winners are documents made with "Print to PDF" or "Save as PDF" from word processors and browsers, which routinely leave page content uncompressed; scanner and multifunction-printer exports, which pile up duplicate image objects and oversized metadata; and PDFs assembled by older or quick-and-dirty libraries that skip stream deflation entirely. On these, Filevo can strip a meaningful chunk of the file without altering a single visible pixel.

Files that were exported by modern design and publishing tools — which already deflate streams, subset their fonts, and compress images — have little slack left, so expect small gains or none. That is not a failure of the compressor; it means your PDF was already lean. Either way, running it costs nothing: Filevo only keeps the result when it is genuinely smaller.

Most "compress PDF" tools chase a smaller number by re-rasterising pages and downsampling images — which is why text can come back fuzzy and photos lose detail. Filevo takes the opposite stance: it only removes redundancy and tightens encoding, so what you download is visually identical to what you uploaded. Every character stays vector-crisp, every image keeps its original pixels. If your priority is "smaller but still print-quality," this is the safe way to do it.

The trade-off is honest too: because nothing is thrown away, Filevo will not reach the eye-popping 80% reductions that aggressive, lossy compressors advertise on image-heavy files. What you get instead is a dependable shrink with zero risk to legibility — ideal for contracts, résumés, reports, and anything headed to print or a regulator.

If your PDF was already saved efficiently — exported by a modern tool that deflates its streams and embeds subset fonts — there may be little or no waste left to remove, and the file simply will not shrink. When that happens, Filevo never returns a file larger than the one you uploaded: it compares the result against the original and gives you back whichever is smaller. So compressing an already-tight PDF costs you nothing and never makes things worse.

PDF compressors fall into two camps, and knowing which one you’re using saves a lot of frustration. Lossy compressors — the "strong" or "extreme" modes on tools like the big-name services — hit dramatic size cuts by re-encoding the page and downsampling images: a 300 DPI scan might be knocked down to 96 or 72 DPI, and photos are re-compressed at a lower quality. That is exactly what you want when you just need to email a slide deck and nobody will ever zoom in. Lossless compression — Filevo’s approach — only removes redundancy: it deflates streams, recompresses without discarding detail, and deletes duplicate objects, so the result is byte-for-byte equivalent on screen.

Pick lossless when the document has to stay print-ready, legally clean, or archival: signed contracts, résumés and portfolios, scientific papers with figures, product spec sheets, anything you will print or file with a regulator. Pick a lossy tool when size is the only thing that matters and quality is expendable. Filevo deliberately occupies the lossless lane, so you never have to wonder whether the compressor quietly softened your text or muddied a chart — what you download is what you uploaded, only leaner.

Everything happens in the browser, so there is nothing to install and no platform that misses out. On Windows or Mac, drag the PDF straight from Explorer or Finder into the box above. On iPhone or Android, open this page, tap Browse Files, and choose the PDF from Files, your downloads, or a cloud drive — then download the smaller version right back to your phone. The same lossless compression runs in the cloud regardless of device, so a phone gets the identical result a desktop would.

Compression runs on Filevo’s servers, not in your browser, but the file never lingers: the moment the job finishes, the uploaded original is deleted, and the optimised result is automatically removed within 24 hours. Nothing is shared, indexed, or kept for training. There is no account to create and no email to hand over, so a sensitive contract or financial statement passes through, gets smaller, and leaves no trace behind. See our Privacy Policy for the full retention details.