How to Save a Word File With Embedded Fonts Without Increasing Size Dramatically

You need to share a Word document that uses a custom font, but you want to ensure the recipient sees the correct typeface without the file becoming too large to email. Embedded fonts can dramatically increase a document’s file size, sometimes by tens of megabytes, because Word includes the entire font file by default. This article explains how to embed only the characters used in your document, which reduces the file size significantly while still preserving the font appearance.

What Happens When You Embed Fonts in Word

When you embed a font in Word, the program copies the entire font file into the document. A single TrueType font file can be 5 MB to 15 MB or more. If you use multiple custom fonts, the file size multiplies. The default embedding option in Word includes every glyph in the font, even characters you never typed. This is unnecessary for most business documents that use only a subset of the font’s characters, such as the Latin alphabet, numbers, and a few punctuation marks.

Word offers two settings that control font embedding behavior. The first setting, “Do not embed common system fonts,” excludes fonts that are already present on most Windows installations, such as Arial, Times New Roman, and Calibri. The second setting, “Embed only the characters used in the document,” is the key to size reduction. When this option is enabled, Word creates a subset of the font containing only the glyphs you have typed. For a typical letter or report, this subset is often under 100 KB per font.

Note that embedding fonts is only possible for TrueType and OpenType fonts that do not have embedding restrictions set by the font designer. Some fonts, especially commercial ones, include a license flag that prevents embedding. Word will warn you if a font cannot be embedded.

Steps to Embed Fonts With Minimal Size Increase

Method 1: Use Word’s Built-in Options

1. Open the document in Word
   Launch Word and open the file that contains the custom fonts you want to embed.
2. Go to File > Options > Save
   Click File in the top-left corner, then Options at the bottom of the left pane. In the Word Options dialog, select Save from the left sidebar.
3. Enable font embedding settings
   Scroll down to the “Preserve fidelity when sharing this document” section. Check the box labeled “Embed fonts in the file.” Then check the box “Embed only the characters used in the document.” Also check “Do not embed common system fonts” to exclude fonts like Arial and Calibri that are already on most systems.
4. Save the document
   Click OK to close the Options dialog. Press Ctrl+S to save the file. Word will now embed only the font characters you used, keeping the file size small.

Method 2: Use a Font Subsetting Tool Before Embedding

If you need more control over which characters are included, or if you are working with a font that Word cannot subset automatically, use a dedicated font subsetting tool. These tools let you select exactly the characters you need and generate a new font file that contains only those glyphs.

1. Identify the characters used in your document
   Review your document and note which letters, numbers, punctuation, and symbols appear. For a typical English document, this includes A–Z, a–z, 0–9, and common punctuation like period, comma, and question mark.
2. Use a font subsetting web tool or desktop application
   Services like Font Squirrel’s Webfont Generator or online tools such as Subsetter allow you to upload a font file, select the characters you need, and download a subset version. For desktop use, tools like FontForge (free) or High-Logic FontCreator (paid) provide advanced subsetting features.
3. Install the subset font on your computer
   After generating the subset font file, install it on your Windows system by right-clicking the file and selecting Install.
4. Replace the original font in your Word document
   Open your Word document, select all text (Ctrl+A), and change the font to the newly installed subset font. Then save the document with the embedding options enabled as described in Method 1.

Common Mistakes and Limitations When Embedding Fonts

“Embed only the characters used” Does Not Always Work for All Font Types

Word’s subsetting feature works reliably for TrueType fonts (.ttf) and OpenType fonts (.otf) that have no embedding restrictions. However, some fonts, particularly variable fonts or fonts with complex OpenType features, may not subset correctly. In such cases, Word may embed the full font regardless of the setting. Test your document after saving by checking the file size and opening it on a computer that does not have the font installed.

You Cannot Embed Fonts in Older File Formats

Font embedding is only supported in Word’s default .docx format and in the older .doc format (Word 97–2003). If you save the document as .txt, .rtf, or .pdf, font embedding settings are ignored. For PDF, you must use a separate PDF printer or export settings that embed fonts.

Embedded Fonts Can Still Cause Large File Sizes if You Use Many Fonts

Even with subsetting, using five or more custom fonts in the same document will increase the file size. Each subset font adds roughly 50 KB to 200 KB depending on the character set. To minimize size, limit the number of custom fonts to two or three. Use common system fonts for body text and reserve custom fonts for headings or logos.

Font Licensing Restrictions Prevent Embedding

Many commercial fonts have an embedding permission flag set to “Installable” or “Editable” which allows embedding. But some fonts are flagged as “Preview & Print” or “Restricted,” which prevents embedding entirely. Word will display a warning when you save the document. In that case, you cannot embed the font by any method. Instead, convert the text to a vector image or use a different font.

Comparison of Font Embedding Options in Word

Item	Default Embedding (Full Font)	Subset Embedding (Characters Used)
File size for a single font	5–15 MB	50–200 KB
Characters included	All glyphs in the font	Only characters typed in the document
Recipient can edit with new characters	Yes, any character is available	No, only existing characters can be used
Compatibility	Works with all embeddable fonts	May fail with variable or complex OpenType fonts
Best use case	Short documents where file size is not a concern	Long documents or files sent via email

You can now save Word documents with embedded fonts that are only a fraction of their original size by using the subsetting option. Start by enabling “Embed only the characters used in the document” in File > Options > Save. For more control, use a font subsetting tool before embedding. If you still need to reduce size further, consider converting text with custom fonts to vector images using the Insert > Shapes or Insert > Text Box feature, which removes the font embedding requirement entirely.