Open any PDF instantly.
Read, sign, edit and convert PDFs on your phone — with no ads before your document and no paywall before you read. Fast even on mid-range and older devices.
Everything PDF, one tidy app
Handle the PDF that just landed on your phone
A document arrives and you need to deal with it now. PDF42 does the whole job without making you wait or pay first.
Read, fast
Open large PDFs and high page-count files in a tap. Search any word and jump straight to the page.
Sign & fill
Sign a PDF in two taps, reuse your saved signature, and fill out form fields right on your phone.
Annotate & draw
Highlight, underline, draw and add notes. Mark up any document quickly and clearly.
13 PDF tools
Merge, split, compress, protect and unlock, convert images to PDF, reorder and rotate pages.
Built to respect your time
Speed isn't a slogan here — it's the whole point. PDF42 is engineered to open documents quickly on the phones most people actually carry.
No splash, no wait
Tap a PDF and start reading — no ad and no loading screen between you and the page.
High page counts
Hundreds of pages and heavy files open and scroll smoothly, not just tiny one-pagers.
Real-world devices
Tuned for Samsung, Xiaomi and Realme hardware — including older phones, not just flagships.
Questions
Good to know
Is PDF42 free?
Yes. Reading every PDF is free with no page limits, plus a daily quota of saves you can refill yourself anytime. PDF42 Pro removes interstitial ads and unlocks unlimited saving and exporting, with a 7-day free trial.
Does PDF42 show ads before opening a file?
Never. PDF42 never shows an ad before your document opens. Any ads appear only at natural transition points — never on app open or before your file loads.
Can I sign and fill PDF forms on my phone?
Yes. You can sign a PDF in two taps, save and reuse your signature, and fill out PDF form fields directly on your Android phone.
Can I merge, split or compress PDFs?
Yes. PDF42 includes 13 tools: merge PDF, split PDF, compress PDF, password protect and unlock, convert images to PDF, reorder and rotate pages, and more.
Are my documents private?
Yes. PDF42 processes your documents on your device. Your files stay on your phone.
What devices does PDF42 support?
PDF42 is built to open large files and high page-count PDFs quickly, even on mid-range and older Android devices from Samsung, Xiaomi and Realme.
Open your next PDF in a tap.
Free to read, fast to use, and it never wastes your time.
Get it on Google Play