On-page & SERP · 8 tools
On-page & SERP tools
The 8 on-page tools that decide whether anyone clicks: SERP preview simulator (desktop + mobile), exact Google pixel-width title checker, meta description length, headline CTR grader, URL slug quality, H1-H6 outline audit, on-page SEO checker.
On-page & SERP
SERP Preview
Google snippet preview
On-page & SERP
Title Pixel Width
Real Google truncation check
On-page & SERP
Meta Description Length
Pixel-accurate SERP check
On-page & SERP
Headline Analyzer
Score any title A–F for SEO & CTR
On-page & SERP
URL Slug Analyzer
Grade any slug A–F
On-page & SERP
Heading Analyzer
H1–H6 hierarchy audit
On-page & SERP
On-Page SEO Checker
Score page HTML + keyword A–F
On-page & SERP
Mobile SERP Preview
Preview your Google snippet on mobile
About these tools
On-page & SERP questions
- Why is pixel-width better than character-count for titles?
- Google truncates titles at ~580 pixels on desktop regardless of character count. A 55-character title with lots of wide letters (MWmw) can be cut off while a 65-character title with narrow letters (ilI1) fits. Our Title Pixel Checker uses Google's Arial 20px character-width table (documented by Greg Gifford in 2020 and verified against Google's SERP rendering in 2023 Zyppy studies) to predict truncation exactly.
- How does the headline analyzer score work?
- Score combines 6 weighted dimensions: word balance across 4 types (common/uncommon/emotional/power), length (55-60 chars ideal), sentiment polarity, number/bracket presence, keyword prominence (position in title), and uniqueness ratio. Weights come from BuzzSumo's 2020 study of 100M articles and BuzzFeed's internal CTR data (published 2017). Scores over 70/100 correlate with 30-50% higher CTR in controlled A/B tests.
- Does URL slug length affect SEO?
- John Mueller confirmed in 2016 that very long URLs with many words aren't good — Google weighs the first 3-5 words of a slug more heavily. Ideal: 3-5 descriptive words, hyphen-separated, 50-60 characters total. Avoid stop words (the/and/of) and dates unless evergreen. Our URL Slug Analyzer scores A-F on length, stop-word ratio, readability, and keyword inclusion.
- What does a proper H1-H6 structure look like?
- Exactly one H1, H2s for major sections, H3s for sub-sections within H2s, and so on — never skip levels (H1→H3 without H2). WebAIM's 2023 screen reader survey shows 86% of screen reader users rely on heading navigation, so structure is both SEO and accessibility. Our Heading Structure Analyzer flags skipped levels, multiple H1s, and empty headings — the three most common audit failures.
More in SEO Analysis