How to Edit PDF on Android for Free (5 Methods)

What "edit PDF" really means on a phone

Before you install anything, it helps to know there are two different jobs hiding behind the words "edit PDF."

Annotating means adding things on top of the document: highlights, underlines, sticky notes, text boxes, drawings, and signatures. This is what most people actually need — marking up a contract, filling a form, signing a letter. Free apps do this very well.

Editing means changing what's already inside the file: fixing a typo in the original text, deleting a paragraph, swapping an image. This is harder, and on mobile it's almost always a paid feature.

So when someone asks "how do I edit a PDF for free on Android," the honest answer is: you can do 90% of real-world jobs free. The last 10% — rewriting existing text or working with scanned pages — usually costs money. The methods below are ordered from most capable to simplest.

Method 1: Xodo PDF Reader & Editor (best free all-rounder)

Xodo is the closest thing to a full PDF editor that costs nothing. The free version includes annotation tools, text boxes, form filling, signatures, and even real-time collaboration. It also syncs with Google Drive, Dropbox, and OneDrive, so your files follow you.

How to use it:

1. Install Xodo PDF Reader & Editor from the Play Store and open it.
2. Tap the folder icon and pick the PDF you want to work on — from your phone storage or a connected cloud account.
3. Tap the pencil/annotate icon in the toolbar. You'll see highlight, underline, text box, drawing, and signature tools.
4. To add text, choose the text tool, tap where you want it, and type. To sign, choose the signature tool, draw your signature once, then place it anywhere.
5. To fill a form, just tap any form field and type — Xodo detects interactive fields automatically.
6. When you're done, the app saves your changes. Use Share to send the edited PDF by email or WhatsApp.

Best for: students marking up lecture notes, anyone filling forms, signing documents, or collaborating — all free.

Method 2: Adobe Acrobat Reader (free tier)

Adobe invented the PDF, and its Reader app is free to download and use on Android. The free tier covers viewing, highlighting, commenting, filling forms, and signing. It's a solid, trustworthy option — just know where the free part ends.

How to use it:

1. Install Adobe Acrobat Reader and open your PDF in it.
2. Tap the comment/pencil icon to open the annotation toolbar.
3. Highlight text, add sticky notes, or draw freehand. Tap a form field to fill it; use the Fill & Sign tool for signatures.
4. Save or share the file when done — your annotations are baked into the PDF.

The catch: if you tap anything labeled Edit PDF (changing existing text), the app will ask you to start a Premium subscription. For annotation, forms, and signing, you never need to pay.

Best for: people who want the "official" Adobe experience and mostly annotate, fill, and sign.

Method 3: Foxit PDF Editor

Foxit is known for being fast and light. Its mobile app opens big PDFs quickly and the free version handles annotation — highlights, notes, and basic markup — without fuss. Like Adobe, the deeper editing tools sit behind a paywall.

How to use it:

1. Install Foxit PDF Editor and open your file.
2. Use the comment toolbar to highlight, underline, or add notes.
3. Save and share as usual.

Best for: older or low-storage phones — Foxit stays quick where heavier apps lag.

Method 4: Online editors in your browser (no install)

Don't want another app? Free online editors like Sejda and Smallpdf run in Chrome on your phone. You upload the PDF, make your edits, and download the result. No install, no account for basic jobs.

How to use it:

1. Open Chrome and go to sejda.com or smallpdf.com.
2. Choose Edit PDF and upload your file.
3. Add text, highlights, or signatures with the web toolbar, then download the edited file.

The catch: your file travels to someone else's server. That's fine for a bus timetable or a public form. For bank statements, medical papers, or contracts — anything with personal data — keep the file on your phone and use Xodo or Adobe instead.

Best for: one-off edits on a borrowed phone, or when you can't install apps.

Method 5: The Google Docs conversion trick

This one surprises people. If your PDF is mostly text (not scanned images), you can convert it into an editable document with Google Docs — free, no extra app.

How to use it:

1. Upload the PDF to Google Drive.
2. In Drive, tap the three dots next to the file, then Open with → Google Docs.
3. Drive converts the PDF into an editable document. Fix your text, rearrange, add pages — it's a normal doc now.
4. When done: File → Download → PDF to get a fresh PDF back.

The catch: complex layouts can shift during conversion — tables, columns, and fancy formatting may not survive perfectly. Check the result before sending it anywhere important.

Best for: actually rewriting text in a simple PDF when you refuse to pay for a "real" editor.

Quick comparison

What free apps can't do (honest limits)

Two jobs stay stubbornly paid, and you should know before you waste an afternoon:

• Scanned PDFs. A scanned page is a photo, not text. Making it editable needs OCR (text recognition), and OCR is a premium feature in nearly every PDF app. You can still highlight and scribble on scans for free — you just can't rewrite their text.
• Perfect text reflowing. Free tools add text on top of the page. They don't reflow paragraphs like Word does. If you need desktop-grade editing, that's what the paid tiers are for.

For everything else — study notes, forms, signatures, corrections in the margins — the free methods above are genuinely enough.

Frequently asked questions