How to Add Text to a PDF for Free in 2026 — Complete Guide

You need to add information to a PDF — fill in a form that isn't interactive, add your name to a document, label a diagram, or insert a date before signing. PDFs are designed to be read-only, so adding text isn't as obvious as in Word. But it's completely possible for free using tools you may already have.

This guide covers every free method to add text to any PDF — on Mac, Windows, iPhone, Android, and in any browser — with step-by-step instructions and tips for making your added text look clean and professional.

When Do You Need to Add Text to a PDF

• Filling non-interactive forms: Many forms are created as flat PDFs without proper form fields. Adding text boxes over the blank lines lets you fill them digitally and return a completed document.
• Adding your name or date: Contracts and agreements often have places for a printed name, date, and location — these need to be filled before a signature is added.
• Labelling diagrams or images: Technical documents, architectural plans, and maps sometimes need additional labels or notes added to the PDF.
• Adding corrections or clarifications: When reviewing a PDF document, adding text boxes with comments or corrections before returning it to the sender.
• Inserting a reference number or code: Business documents sometimes need a job number, client code, or reference added before filing or sending.

Best Free Methods Overview

Mac — Preview App (Best Free Option)

Mac Preview lets you add text boxes to any PDF with full control over font, size, and color. No download needed — Preview is on every Mac.

Windows — Free Options

Google Chrome or Microsoft Edge (Form Fields Only)

Open your PDF by dragging it into Chrome or Edge. If the PDF has proper interactive form fields, click on them and type — no additional tools needed. For flat PDFs without form fields, the browser viewer cannot add text boxes. You'll need LibreOffice or an online tool for those.

LibreOffice Draw (Full Text Box Support)

Right-click your PDF → Open With → LibreOffice Draw. Go to Insert → Text Box, then draw a box anywhere on the page and type your text. Full font and color control is available through the Format menu. Export as PDF when done: File → Export as PDF. LibreOffice is a free download (~300 MB) from libreoffice.org but works completely offline with no uploads.

Adobe Acrobat Reader (Form Fields Only)

The free Adobe Reader can fill interactive form fields but cannot add text boxes to flat PDFs. For flat PDFs, it will prompt you to upgrade to Acrobat Pro. Use LibreOffice instead for flat PDFs on Windows.

iPhone and Android

iPhone — Files App Markup

Open the PDF in the Files app → tap the Share button → Markup. Tap the + button in the bottom-right → Text. A text box appears — tap it to edit, drag to position, tap the Aa button to change font size and style. Tap Done when finished and save to Files. This works for any PDF and keeps everything local.

Android — Adobe Acrobat App (Free) or Markup Apps

The free Adobe Acrobat Android app allows filling interactive form fields. For adding custom text boxes, the Xodo PDF app (free) is the best option — it supports adding text annotations and text boxes to any PDF on Android. Open in Xodo → tap the annotation icon → select Text → tap to place a text box anywhere on the page.

Free Online Tools

iLovePDF Edit PDF

At ilovepdf.com/edit-pdf — upload your PDF, click the Text icon in the toolbar, click anywhere on the page to place a text box. Choose font, size, and color. Download when done. Free with no daily limit on basic text editing features.

Smallpdf Edit PDF

At smallpdf.com/edit-pdf — similar interface with text box placement, font selection, and color control. Free for two tasks per day. Files are processed securely and deleted within one hour.

PDF24 Edit

At tools.pdf24.org/en/edit-pdf — free online editor with text box tool. PDF24 also offers a free offline Windows app (PDF24 Creator) for completely local editing with no uploads and no usage limits.

Tips for Clean-Looking Added Text

• Match the font and size carefully. Most body text in professional PDFs uses fonts like Arial, Helvetica, Times New Roman, or Calibri at 10-12pt. Zoom in on existing text to estimate the size, then match it in your text box.
• Use the same black (#000000) or match the document color. Text that doesn't match the document's color scheme looks immediately out of place. Use the color picker to sample the existing text color.
• Align text boxes to the baseline of existing form lines. When filling in form lines, position the bottom of your text to sit just above the line, not floating in the middle of the space.
• Remove text box borders. In Mac Preview and most tools, new text boxes have a visible border by default. Set the border color to "None" or transparent so only the text itself is visible.
• Zoom to 100% or higher when placing text. Placing text at 50% zoom makes precise positioning much harder. Zoom to at least 100% to align text accurately with form fields and document lines.

Frequently Asked Questions