For transactional email
Consider SMTP2GO for website-generated messages, form notifications, account notices, and other outbound system email.
Explore SMTP2GOAvailableFree browser-local analysis
Font Loading Checker
SiteTend Font Loading
Find missing display policies, unnecessary variants, legacy formats, blocking font CSS, duplicate sources, and ordering problems.
Your input stays private.HTML and CSS are analyzed in your browser.
Paste font-loading markup
Add HTML, head markup, CSS, @font-face rules, or preload links.
Review font loading
Start with text visibility, blocking requests, and unnecessary variants.
Your analysis will appear here
Paste font markup and select Analyze fonts.
How to improve
Load the fewest fonts the first view needs
Define text-display behavior, prefer efficient formats, limit families and weights, and preload only critical files. Verify changes on slow mobile connections and watch both text timing and layout stability.
Questions
Font Loading Checker FAQ
Should every web font be preloaded?
No. Preload only font files required by initial viewport text. Excessive font preloads compete with more important page resources.
Which font-display value is best?
There is no universal choice. Swap and optional are common performance-oriented policies, but the right value depends on brand requirements and acceptable layout behavior.
Is self-hosting always faster than Google Fonts?
No. Self-hosting improves control but adds licensing, subsetting, caching, update, and maintenance responsibilities. Compare measured outcomes.
Can this checker determine whether a font is actually used?
No. Version 1 analyzes pasted declarations and markup without runtime coverage, network data, or viewport context.
Apply the result
From finding to verified fix
Interpret the finding
Focus on fonts needed for the first viewport. More preloads are not automatically better and may compete with critical page resources.
Common causes to inspect
- Too many families or weights
- Missing font-display behavior
- Remote stylesheets and nonpreloaded critical files
Practical next steps
- Reduce required variants
- Choose an appropriate display strategy
- Preload only verified critical files and measure again
What this check cannot prove
Pasted markup cannot confirm font response headers, transfer timing, glyph coverage, fallback matching, or layout shift.
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Use WhatConverts to measure which marketing sources produce calls, forms, and leads. It measures outcomes; it does not fix technical website issues.
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Consider Optery if exposed personal information or data-broker listings are a concern. It is a separate privacy resource, not an SEO or website-security scanner.
Explore OpterySiteTend may earn a commission if you purchase through these links, at no additional cost to you. These services are optional and separate from SiteTend's free checks.