Comprimir PDF
Reduce PDFs para respetar los límites de correo o subidas gubernamentales. Ideal para documentos escaneados, PDFs con muchas fotos y contratos que necesitas enviar por correo.
Heads-up: this MVP rasterizes pages — meaning text becomes images and is no longer selectable or searchable. Best for shrinking scanned documents, photo PDFs, and email attachments. We're working on a structural mode that keeps text searchable.
Suelta PDFs en cualquier lugar de la página
Cualquier cantidad, cualquier tamaño que aguante tu dispositivo.
We try progressively heavier compression until each PDF fits under your target. May take 2–4× longer than preset mode.
Ajustes avanzados
Aún no hay archivos
PDFs appear here after you drop them.
¿Cómo funciona la compresión PDF?
Most "huge" PDFs are huge because of embedded images at print resolution (300 DPI scans, photos from a phone, screenshots of dense documents). Reducing those images is where almost all the savings come from.
This tool re-renders every page of your PDF at a lower DPI you choose, then re-encodes each page as a JPEG inside a new PDF. The result is a file that looks the same on screen but is often 5–20× smaller — perfect for the common goal of "fit this contract under the 10 MB email cap."
The trade-off: text becomes an image, so you can no longer copy-paste from the PDF or search inside it. For scanned documents that were never searchable to begin with, this is a non-issue. For a born-digital PDF with selectable text, weigh whether you care more about size or searchability.
¿Qué ajuste para qué tarea?
Email attachment — 150 DPI, 72% JPEG. Targets under 10 MB so Gmail accepts it without splitting. Best general-purpose preset.
Government upload — 120 DPI, 65% JPEG. Targets under 5 MB, the common cap for tax / immigration / school forms.
Incrustar en web — 110 DPI, 78% JPEG. Optimized for fast in-browser viewing.
Calidad de impresión — 200 DPI, 88% JPEG. Preserves enough detail for office printers. Larger output but still much smaller than the original print-resolution scan.
Compresión máxima — 96 DPI, 55% JPEG. Smallest possible file. Small text gets less legible.
F.A.Q.
Are my PDFs uploaded to your server?
No. Compression runs entirely in your browser using Mozilla's PDF.js renderer and the pdf-lib library, both compiled to JavaScript that runs locally. Your PDF — even a sensitive contract or tax return — never leaves your device. Disconnect WiFi after the page loads to prove it.
Will I still be able to search inside the compressed PDF?
No — this MVP rasterizes pages, so text becomes part of the image. We're working on a structural compression mode that preserves selectable text. For now: if you need a searchable output, this tool isn't the right pick. If you just need the file under the size cap to send by email — it's perfect.
Does it work on password-protected PDFs?
No. Unlock the PDF first using whatever software it was protected with (e.g. Acrobat, Preview on macOS, or a desktop tool). We don't accept the password to avoid creating any reason for the data to leave your device.
Are PDF form fields and signatures preserved?
In this rasterize mode: no. The output is a flat picture of each page. Form fields become un-fillable images and digital signatures are stripped (the visible signature stays as a picture, but the cryptographic part is gone). Don't compress a digitally-signed contract this way — the signature will be invalidated.
Why are my "compressed" PDFs sometimes bigger than the original?
If the original PDF was mostly text (small filesize already), re-rendering each page as a high-DPI JPEG produces a larger output. For text-only PDFs, this tool is the wrong choice — use it for scans, photo-heavy reports, and forms where images dominate the file size.
What's the maximum PDF size?
No hard cap. The real limit is your device's RAM — large PDFs need lots of memory because every page is decoded into a pixel buffer. A modern laptop can typically handle PDFs of several hundred MB and hundreds of pages.