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Problems

Common PDF Problems

Each page describes the problem, why it happens, and the steps that fix it — with the PDF JustFit feature that does the work.

Short answer: PDF JustFit solves the most common PDF problems on iPhone and iPad: files that are too large to send or upload, scanned documents that cannot be searched, long documents that are hard to understand, and documents that need signing.

PDF problems, solved

PDF problems usually start with a limit: an email attachment cap, an upload maximum, or a document that cannot be searched. Each page below covers one problem end to end.

01

PDF Is Too Large

What to do when a PDF file is too large — why PDFs grow, and how to reduce one to a size that works.
02

PDF Is Too Large for Email

Email attachment limits explained, and how to compress a PDF to a size that will actually send.
03

PDF Is Too Large to Upload

When a website or portal rejects a PDF for exceeding its size limit, here is how to bring the file under the cap.
04

Scanned PDF Is Not Searchable

Why scanned PDFs cannot be searched or copied, what OCR does, and how to make a scanned document searchable.
05

I Need to OCR a PDF

When you need to extract text from a PDF — including a scanned one — and how OCR fits into the rest of the workflow.
06

I Need to Understand a Long PDF

When a document is too long to read end to end, ask it questions instead. How on-device AI document chat helps.
07

I Need to Sign a PDF

How to sign a PDF on iPhone or iPad without printing it, and what a flattened export means.
08

Compress a PDF on iPhone

How PDF compression works on iPhone — from Files, from the share sheet, and without a desktop computer.
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PDF JustFit: Compress, AI Chat is available on the App Store for $9.99. Requires iOS/iPadOS 26.5 or later.

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