How to add symbols to PDF documents and insert special characters online

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For different purposes of your document workflow, you can insert special characters in PDF files by adding a text box, pasting the symbol you need, and saving the edited document. pdfFiller enables you to add symbols to PDF files online, including checkmarks, currency signs, accented letters, degree symbols, and other frequently used symbols without converting the file first.

Summary: How do you add symbols to a PDF?

The easiest way to add symbols to a PDF is with an online PDF editor. If you choose pdfFiller, the process will be just as simple:

  • Upload your PDF file to pdfFiller from your computer or cloud storage
  • Add a Checkbox from the fields list in the Create form tab.
  • Open the editor and choose a PDF editing tool: Check, Cross, or Circle
  • Use the Text tool to insert symbols by typing, pasting from your computer’s character map
  • Adjust the size, color, and position so the symbol fits the document
  • Select Done to save, download, share, print, or send the PDF

We’ll explore these steps in greater detail below, but this simple process ensures anyone can modify a PDF or edit a PDF form seamlessly, no matter their technical skill level. If you need more information about pdfFiller, visit our Wikipedia page.

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What is the best way to insert special characters in a PDF online?

The word “method” may seem an overstatement for such a simple action, but there may be differences depending on the type of symbol you need. For common marks, use the PDF editor’s built-in tools. For letters, currency symbols, and mathematical symbols, use the Text tool and paste the symbol into the PDF document.

Need

Best method

Example

Checkmark or approval mark Use Check Completed tax form item
Cross or rejection mark Use Cross Incorrect field on a claim form
Circle or visual note Use Circle or annotate tools Highlight a field to review
Currency symbol Use Text and paste the symbol €250 or £500 invoice line
Degree symbol Use Text and paste ° 45° angle or 72°F
Accented letters Use Text and paste characters José, Müller, Québec
Math or Greek symbols Use Text and paste from a character map α, β, ≥, ±

Though the comparison seems obvious, it helps users choose a tool before editing the file. It also reduces formatting errors because each symbol is added in the most practical way.

How do you insert special characters in a PDF with pdfFiller?

pdfFiller is an online PDF editor, so you can edit PDF files in a browser without installing desktop software. The platform supports PDF and other file types, including DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, XLS, XLSX, and TXT uploads.

1. Upload your PDF

Open pdfFiller and upload your PDF file from your device. You can also import files from cloud storage, including Google Drive, Box, and Dropbox.

The Add New dropdown menu in pdfFiller offers several options, including creating folders, uploading documents, making blank PDFs, and adding contacts. You can also upload files from your device or cloud storage like Google Drive, Dropbox, OneDrive, and Box.

You can upload documents from your computer or cloud storage, or start fresh by creating a new one through the Add new menu.

2. Access the tools in pdfFiller’s editor

Once the document opens, use the editor toolbar to choose the PDF editing tools you need. You can add text, marks, comments, sticky notes, images, signatures, and form fields depending on the task.

pdfFiller's editor interface displaying a toolbar with multiple editing tools such as text, signature, initials, image insertion, highlight, draw, shapes, and more.

Use the intuitive toolbar to quickly add text, signatures, images, and annotations while editing your PDF document.

3. Add simple symbols directly from the toolbar

To add a checkmark to PDF forms, select a tool such as Check, Cross, or Circle. Place the mark where it belongs, such as inside a form field or beside an approval line.

4. Use the Text tool for special characters

Select the Text tool, click where the symbol should appear, and type or paste the character. This method works well for currency signs, degree symbols, accented letters, mathematical symbols, and legal symbols.

pdfFiller’s editor with the Text tool selected, showing a text box containing special characters and resize handles around it.

Add and edit text, including special characters, by inserting a text box and adjusting it directly on your PDF.

5. Copy and paste from your computer or an online resource

On Windows, open Character Map, choose the glyph, copy it, and paste it into the text box. On macOS, open Character Viewer, select the character, and paste it into the PDF editor. You can also use online resources and copy and paste symbols from there.

6. Adjust appearance

Change the font size, color, and alignment so the inserted symbol matches the PDF format. Move the cursor or drag the text box to position the symbol in the right space.

7. Save and export

Select Done when you finish editing. You can save, download, print, email, fax, or share the edited document.

pdfFiller's toolbar with tools like Draw, Sticky Notes, Watermark, Comment, Replace, Search, Settings, and a prominent Done button highlighted.

Finish editing your document by clicking the Done button after using the available annotation and editing tools

This workflow is useful for small business owners, real estate agents, construction managers, legal assistants, and insurance teams that edit forms, add signatures, and manage paperwork under time pressure.

How can you add checkmarks and symbols to PDF forms?

PDF forms often require clear, concise markings. A checkmark is a simple way to indicate approval, completion, consent, or selection without needing lengthy annotations.

When using pdfFiller, there are two primary ways to add a checkmark. For forms requiring an interactive, fillable field, use the Checkbox tool from the fillable fields menu. If you only need to place a static, visible mark on the page, the Check tool is the better option. To maintain a consistent and professional appearance, pdfFiller also lets you customize the font, size, color, and placement of your text and checkmarks.

After creating an interactive form, it’s wise to test the final PDF before sharing it. Open the saved document to verify that all symbols display correctly for recipients.

What formatting practices prevent symbol errors?

Symbols can display incorrectly when a PDF uses unsupported fonts or nonstandard encoding. The most common warning signs are squares, hashtags, blank spaces, or misplaced characters.

Use these best practices before you save or publish the PDF:

  • Use standard Unicode symbols when possible
  • Match the symbol style to the surrounding text
  • Avoid unusual fonts when a document must be shared widely
  • Save the final version as a PDF before sending it
  • Reopen the downloaded file to confirm that symbols display correctly
  • Use a password or encryption when the document contains sensitive information

These steps help protect both readability and file integrity. For sensitive contracts, personnel forms, tax documents, or claims files, secure sharing is as important as accurate editing.

Do you need Adobe Acrobat to insert symbols in PDF files?

While Adobe Acrobat is the industry standard for PDF editing, many everyday tasks can be accomplished just as easily with another online PDF editor.

pdfFiller lets users edit PDFs, add text, place checkmarks, create fillable fields, sign documents, and export files directly in a browser. That makes it a practical choice for users who need to update a PDF document without switching between several software tools. Learn more about pdfFiller’s editing functionality from the guide: How to edit a PDF.

Adobe Acrobat remains useful for advanced production or for teams familiar with Adobe infrastructure. For routine business forms, contracts, invoices, and onboarding documents, pdfFiller gives teams a user-friendly way to insert the symbols PDF files need and finish work online.

Final thoughts: why precise symbols make PDFs more professional

Small details can change how people understand a document. A correct checkmark, currency sign, degree symbol, or accented name helps users read, approve, and sign files with more confidence.

With pdfFiller, you can upload, edit, annotate, sign, save, and download PDF files using online PDF editing tools built for daily business work.

Start your free trial of pdfFiller today to add symbols, complete forms, and manage documents from one secure workspace.

Glossary

  • Add Text: A PDF editor feature that lets users place new text anywhere in a document.
  • Character Map: A Windows tool for finding and copying special characters, symbols, and letters.
  • Character Viewer: A macOS tool for finding and copying special characters, symbols, emoji, and accented letters.
  • OCR: Optical character recognition, a process that turns scanned document images into searchable text.
  • PDF editor: Software or an online tool used to edit, annotate, sign, and save PDF files.
  • Special characters: Symbols or letters outside standard plain text, such as ©, ®, €, °, é, α, and ✓.
  • Unicode: A standard that helps computers display text and symbols consistently across systems.
  • eSignature: An electronic signature used to sign digital documents. In many business contexts, eSignature workflows may relate to laws such as the ESIGN Act in the United States or eIDAS in the European Union.

Disclaimer: This article is for informational purposes only and does not constitute legal advice.

FAQ

1. How do I add a checkmark to a PDF checkbox?
Open the PDF in pdfFiller and choose Check from the editor toolbar. Place the mark inside the checkbox and adjust its position if needed. Select Done to save the edited PDF.
2. Can I insert Greek letters or math symbols in my PDF?
Yes, you can insert Greek letters and mathematical symbols by using the Text tool. Copy the symbol from your computer’s character map or another trusted source, then paste it into the PDF. Review the downloaded file to confirm the character displays correctly.
3. Why are my symbols showing up as squares or hashtags?
This usually happens when the PDF viewer or font cannot display the symbol. Try using a standard Unicode character and a common font. Save and reopen the file before sharing it with other users.
4. Is it possible to add a degree symbol using an online editor?
Yes, you can insert a degree symbol in PDF files with an online PDF editor. Add a text box, paste the ° character, and move it beside the number. This is useful for measurements, temperatures, and angles.
5. How do I use the character map on my computer to add symbols to a PDF?
On Windows, open Character Map, select the symbol, copy it, and paste it into a pdfFiller text box. On macOS, use Character Viewer to find and copy the character. After placing it in the PDF, adjust the size and position.
6. Can I change the color and size of a symbol after inserting it?
Yes, if you insert the symbol as text, you can usually change its size, color, and placement. pdfFiller supports formatting options for text and checkbox edits. Use these controls to match the symbol to the document.
7. Will my special characters be visible to other people reading the PDF?
For symbols to be visible, they must be saved correctly and supported by the PDF viewer. To ensure compatibility, use standard symbols and always review the exported PDF before sending. For critical documents, it's wise to test the file in multiple PDF viewers.
8. How do I insert currency symbols like the Euro into a PDF invoice?
Use the Text tool, paste the currency symbol, and place it next to the amount. For example, you can add €, £, or $ to invoice totals or line items. Check the final PDF to make sure the number and symbol stay aligned.
9. Do I need specialized software like Adobe Acrobat to add symbols?
Yes, you can add symbols to a PDF using an online editing tool like pdfFiller. While Adobe Acrobat is a well-known option for editing PDFs, it isn't the only solution. Many business users find that an online PDF editor is sufficient for adding text, marks, signatures, comments, and forms.
10. Can I add emojis to a PDF document?
When using pdfFiller, you can easily copy and paste emojis directly into the text field on the PDF. However, it's important to keep in mind that not all devices and software may support the use of emojis, so be sure to check the final PDF before sending it out.