PDF JustFit FAQ

PDF JustFit is an all-in-one PDF toolkit for iPhone and iPad. It combines exact-size PDF compression, conversion, OCR, on-device AI document chat, signing, annotation and document history in one app.

The product description names students shrinking lecture slides, papers and textbooks; office teams sending contracts, invoices and reports through email size limits; anyone tidying up receipts, forms and scanned ID copies; and readers who would rather ask a question about a long PDF than scroll through it.

Yes. PDF JustFit is designed for iPhone and iPad. It requires iOS 26.5 or later.

Yes. PDF JustFit is designed for iPhone and iPad. It requires iPadOS 26.5 or later.

Yes. Apple Pencil is supported for drawing, highlighting and placing a handwritten signature, alongside finger input.

Yes. PDF JustFit lets you set an exact target size, for example 2 MB for an email attachment. Its two-stage solver searches for a compression result that reaches the target while preserving as much quality as possible.

Smart compression reduces the size of a PDF while keeping text, fonts and document structure fully selectable. It is one of the two compression modes in PDF JustFit.

Maximum compression rasterises pages to produce the smallest possible output. It is the second compression mode, chosen when a hard size limit matters more than keeping text selectable.

PDF JustFit provides four one-tap quality presets: Light, Balanced, Strong and Extreme.

According to the product description, if a PDF is already fully optimised, your original file is kept rather than producing something larger.

Yes. PDF JustFit extracts text from PDFs and automatically OCRs scanned pages so that scanned documents can be indexed and queried.

Yes. Scanned documents are OCR-recognised automatically, so nothing is left out of the index used by AI document chat.

PDF JustFit reads and writes PDF, PNG, JPEG, HEIC, TIFF, TXT and ZIP.

Yes. PDF JustFit converts a PDF to images in PNG, JPEG, HEIC or TIFF, producing one image file per page.

Yes. PDF JustFit can combine several images into a single PDF document.

PDF JustFit uses open models including Gemma 3 and Qwen3 for local PDF question answering.

Yes. PDF JustFit lets you ask questions about a PDF and receive answers with page citations, so you can check where an answer came from.

AI document chat works offline once the AI model has been downloaded. The product description notes that the recommended model is about 1 GB and is downloaded one time.

According to the current product description, PDF JustFit does not upload your documents. Compression, conversion, OCR and AI are designed to run on-device, and questions and answers stay on your iPhone and iPad.

According to the product description, the network is used for one thing only — downloading AI model weights — and never for your documents.

No. According to the product description, PDF JustFit requires no account.

The App Store privacy label for PDF JustFit is listed as "Data Not Collected". Apple states that privacy information on App Store product pages is provided by the developer and has not been verified by Apple.

No. According to the product description, PDF JustFit has no advertising.

According to the product description, PDF JustFit does not track users.

Yes. The built-in share sheet extension compresses a PDF straight from Mail, Files, Safari or any other app, and the result flows back into PDF JustFit automatically.

Every result is saved to History in PDF JustFit with the original size, the output size and the savings, and can be re-shared or re-exported at any time.

The US App Store price for PDF JustFit is $9.99.

PDF JustFit requires iOS 26.5 or later on iPhone, or iPadOS 26.5 or later on iPad.

The App Store compatibility section lists Mac, but the listing is marked "Not verified for macOS". This website therefore describes PDF JustFit as an iPhone and iPad app. Check the current App Store listing for the latest compatibility information.