Cómo comprimir un PDF en iPhone gratis

Esto funciona en cualquier iPhone o iPad con iOS 15 o posterior. Solo necesitas Safari, que viene preinstalado en cada dispositivo Apple. Todo el proceso toma menos de un minuto, incluso en conexiones lentas.

1. 1Abre Safari en tu iPhone y ve a lazy-pdf.com. Tap the Compress PDF tool on the homepage.
2. 2Toca el área de carga on the page. iOS will show you options to select a file. Choose "Browse" to open the Files app, where you can navigate to your PDF. It might be in On My iPhone, iCloud Drive, or a third-party cloud service like Google Drive or Dropbox.
3. 3After selecting your PDF, choose a compression level. For sharing via email or messaging apps, maximum compression gives the smallest file. For documents you plan to print later, select a lighter setting.
4. 4Toca Comprimir. Once processing finishes, tap Download. Safari will ask if you want to download the file — tap Download again. Find your compressed PDF by tapping the download arrow icon in Safari's address bar, or open the Files app and look in the Downloads folder.

The most common reason is sharing. Apple Mail has a 20MB attachment limit, and many corporate email systems cap it at 10MB. iMessage can send larger files but compresses them unpredictably. If you need to send a PDF with guaranteed quality and manageable size, compressing it yourself gives you control. Another common scenario is uploading documents to web portals. Insurance claims, job applications, university admissions, government forms — many of these portals impose strict file size limits. Trying to upload a 40MB scanned document on an iPhone only to get a "file too large" error after waiting two minutes is maddening. iPhone storage is also a factor, especially on 64GB and 128GB models. If you have accumulated scanned documents, downloaded manuals, or academic papers, compressing them can free up meaningful space without deleting anything.

Before compressing, check your PDF's file size in the Files app. Long-press the file and tap "Get Info" to see how large it is. This helps you know how much compression you need. If you are compressing a file from iCloud Drive, make sure it is fully downloaded first. Files with a cloud icon next to them need to be downloaded before they can be uploaded to LazyPDF. Tap the file once in the Files app to trigger the download. For the smoothest experience, use Safari rather than a third-party browser. Safari has the best integration with iOS's file picker and download system. Chrome on iOS works too, but the download flow requires an extra step to save the file. After compressing, you can share the file directly from Safari's download list. Tap the download arrow in the address bar, then tap the share icon next to your compressed file to send it via Mail, Messages, AirDrop, or any other app.

LazyPDF is designed to work smoothly on mobile browsers, including Safari on iPhone and iPad. The upload area is large and easy to tap, the interface adapts to smaller screens, and the compression runs quickly even on older iPhones. Since it is entirely browser-based, there is no app to download, no storage space wasted, no push notifications to deal with, and no subscription to forget to cancel. You just open Safari whenever you need to compress a PDF, and close the tab when you are done.