Complete PDF Editing Guide - How to Add Signatures, Checkmarks, and Drawings to PDF

Need to sign a PDF or add checkmarks but don’t have the right software?
After reading this guide, you’ll be able to easily add signatures, checkmarks, drawings, and text without complex PDF editing programs.

No installation required.
No login needed.

Use it directly in your browser!
From contract signatures to checklist completion, your document work will become much more convenient.

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Real-World Use Cases

Office Worker Kim
Drew a signature directly on a contract PDF and marked consent items with checkmarks.

Student Lee
Typed answers into the problem PDF from the professor and highlighted important parts like a highlighter.

Freelancer Park
Added comments as text to the client’s proposal PDF and marked sections needing revision with X marks.

Job Seeker Choi
Uploaded a signature image to the application PDF and completed all checkboxes with checkmarks before submission.

How to Edit PDF (3 Steps)

Step 1: Upload PDF

Drag and drop or click the “Upload PDF” button.
Supports files up to 100MB.

Step 2: Select Tool

Choose from checkmark, X mark, signature, drawing, or text.
You can freely change colors with 14 preset colors + custom color picker.

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Step 3: Edit and Download

Click to add at desired locations and press the “Save PDF” button!
The edited PDF will be downloaded automatically.

iTool vs Other Tools

Key Features

5 Annotation Tools
Provides checkmark, X mark, signature (draw + image upload), drawing, and text tools.
You can also freely move the PDF with the hand tool.

Various Color Options
14 preset colors (black, red, blue, etc.) + custom color picker for your desired colors.
Different colors can be applied to each tool.

Text Formatting
Freely select font type (Nanum Gothic, Nanum Myeongjo, Times New Roman), size (8~72), bold, italic, and underline.

Drawing Options
Adjust line thickness in the 1~20px range with thin, medium, thick buttons or slider.

Zoom Control
Zoom adjustment in 10% increments from 50% to 200%.
Fit to width for perfect screen fit, and drag to move with hand tool.

Free Editing
Move all elements by dragging, resize to adjust size.
Accidentally added elements can be immediately deleted with Delete key or delete button.

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Frequently Asked Questions

Q. How do I add a signature?
Click the signature button, then draw directly or upload an image file.
The added signature can be repositioned and resized by dragging.

Q. Can I change colors?
Yes! Click the color button (circle) to select from 14 preset colors or custom colors.
The selected color applies to all newly added elements.

Q. Can I change text formatting?
Yes! When you select the text tool, options appear at the top.
You can select font type, size, bold, italic, and underline.

Q. Can I edit multi-page PDFs?
Yes! Use the page navigation buttons (◀ ▶) to move between pages and edit each page independently.

Q. Is my PDF sent elsewhere?
No! All operations occur only in your browser.
PDF files are not transmitted to servers, making it 100% secure.

Related Recommended Tools

• PDF Merge - Combine multiple PDFs and images
• PDF Split - Split PDF by pages
• Delete PDF Pages - Remove specific pages

Start iTool PDF Editing now to easily handle everything from contract signatures to document annotations!