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Free AI Subheading Generator

H2 and H3 subheadings for any post title.

156K+
Outlines generated
~2s
Average run
7
Intent modes
4.8/5
Trustpilot rating

How to use the AI Subheading Generator, step by step

Real screenshots of the current tool, using sample inputs. Long results are shown as a preview.

  1. 1

    Add your input

    Paste or type into the field AI Subheading Generator works from.

    Free AI Subheading Generator in its default state before the walkthrough
  2. 2

    Sample text in place

    With sample text entered, AI Subheading Generator is ready to run.

    Free AI Subheading Generator with sample input or settings in place
  3. 3

    Review the result

    Select Generate subheadings to run the tool. This screenshot shows the result returned for the sample input.

    Free AI Subheading Generator showing its actual result with sample inputs

Outline a post in 3 steps

From blank title to structured H2/H3 outline in under 10 seconds.

01

Paste your title

Drop a specific post title. Broad titles produce broad outlines.

02

Pick intent + tone

Listicle, how-to, guide. 7 tones × 7 audiences.

03

Generate and structure

Review. Rearrange. Copy all or export to outline.

Original Grigora research

H2 count vs. featured-snippet win rate

We examined 3,100 queries where Grigora content ranked top-3. The H2 count on winning pages clusters strongly around 6-10.

1-3 H2s
28% win rate
Too shallow, rarely wins snippet
4-6 H2s
64% win rate
Acceptable for short-form posts
7-9 H2s
91% win rate
Sweet spot for pillar content
10-14 H2s
76% win rate
Works for listicles
15+ H2s
42% win rate
Overly fragmented

Source: Grigora featured-snippet study, 3,100 queries, Jan-Mar 2026. Win rate = % of our top-3 ranks that captured snippet.

Platform-specific guides

Drop outlines straight into your CMS or writing app.

WordPress (Gutenberg)

  1. 1.Copy all subheadings.
  2. 2.Paste into your draft, then select each and apply "Heading 2" from toolbar.
  3. 3.Use Yoast SEO outline view to verify hierarchy.

Notion

  1. 1.Paste subheadings into a new Notion page.
  2. 2.Apply H2/H3 via /h2 or /h3 commands.
  3. 3.Use toggle blocks if you want collapsible outline.

Google Docs

  1. 1.Paste the outline at top of doc.
  2. 2.Select each H2, apply Heading 2 style via Format menu.
  3. 3.Use outline panel (View → Outline) to navigate while writing.

Next.js MDX

  1. 1.Paste outline into your MDX file with ## prefix for H2.
  2. 2.Each ## becomes an H2 via MDX rendering.
  3. 3.Use rehype-slug for auto-anchor links.

Webflow CMS

  1. 1.Use Rich Text field for body.
  2. 2.Type subheadings in editor, select → H2 or H3.
  3. 3.Use CMS collection template to auto-apply styles site-wide.

Who uses the subheading generator

Real use cases from real customers.

Bloggers

Outline before writing. Saves 30-45 min per post vs. staring at blank page.

3x post output / week

Content strategists

Build a quarter of content briefs in one afternoon. Hand outlines to writers.

80+ briefs / day

SEO teams

Audit competitor outlines, generate stronger alternatives with keyword coverage.

+24% topical depth score

Students

Structure essays and papers before drafting body paragraphs.

40% faster thesis drafting

Course creators

Turn lesson titles into module outlines with sub-topics.

10 lessons in one afternoon

YouTubers / Podcasters

Generate show notes and timestamp structure from episode titles.

SEO-ready descriptions

Common outline mistakes & fixes

The 8 most common issues, and the 10-second fix for each.

Output is 5 generic headers

Fix: Your title is too broad. "SEO tips" → "Technical SEO for Next.js sites in 2026". Specificity → specific headers.

Subheadings are all questions

Fix: Switch Intent from "Question-Based" to "Ultimate Guide" or "Auto". Question format is narrow by design.

Missing the H3 sub-sections

Fix: Short titles produce flat H2-only outlines. Use "Ultimate Guide" intent for nested H3s.

Keyword missing from headers

Fix: Put the exact target keyword in your title. The AI extracts from the title text; it won't guess from context.

Headers contradict each other

Fix: Happens when Intent and Audience conflict (e.g., "Controversial" + "Executives"). Pick compatible pairs.

Too many headers (15+)

Fix: Set Intent to "How-To" or "Comparison". Both have natural caps. "Listicle" and "Ultimate Guide" tend to go longer.

Listicle structure inconsistent

Fix: Each H2 should start with a number or parallel verb. If AI breaks pattern, re-run. Second pass usually fixes.

Academic voice missing

Fix: Pair Academic tone + Experts audience. Using only one produces casual voice regardless of topic.

Grigora vs. Semrush vs. Surfer

Feature comparison of the three most-used outline tools.

FeatureGrigoraSemrushSurfer
Free unlimited outlines
Intent selector (7 modes)
Mixed H2 + H3 hierarchy
7 audience presets
No signup required
SERP-based keyword coverage
Privacy (no storage)
API access
Optimized for ChatGPT, Perplexity, AI Overviews

Built for AI search

AI assistants prefer content with clean heading hierarchy. Structured outlines are the foundation of citations.

Schema-rich page

SoftwareApplication, FAQPage, HowTo, Breadcrumb, ItemList embedded.

Hierarchical outlines

H2s for topics, nested H3s for sub-topics. Mirrors how AI indexes content.

Citation-worthy research

H2-count study (n=3,100) gives AI assistants a quotable source.

Beyond one outline, build an SEO site

Grigora is a no-code SEO-first CMS. Outline, write, and publish posts inside one editor. Schema and sitemaps auto-generated.

AI editor

Outline, expand, rephrase inside your posts. 20+ actions.

Auto-SEO

Schema, sitemaps, meta tags auto-managed across every page.

Performance

Core Web Vitals green out of the box.

Start free

Related writing tools

Outline, write, and polish a full blog post in under 15 minutes.

AI Blog Topic Generator

Generate post titles before outlining subheadings.

AI Section Writer

Expand each subheading into a full 300-500 word section.

AI Title Writer

Refine H1 options for your post.

AI Blog Intro Writer

Write the intro after outlining.

AI Blog Conclusion Writer

Close with a CTA that converts.

AI Meta Description Writer

Write SERP-ready meta for the post.

Frequently asked questions

Questions users ask before generating their first outline.

It takes your blog post title and outputs 8-12 H2/H3 subheadings with logical flow, keyword coverage, and tonal consistency. Use it to plan a post before writing a single paragraph.
The generator produces a mix. Typically 6-8 H2s (main sections) and 2-4 nested H3s (sub-sections). You can restructure freely. Most blogs use H2s for main sections and H3s only when a section has 3+ distinct sub-topics.
Between 8 and 12 depending on your intent. "Listicle" tends to produce more (10-15). "How-To" fewer but more sequential (6-10).
No. Search engines evaluate the content under your subheadings, not whether an AI wrote the header. Well-structured H2/H3 hierarchy helps ranking (featured snippets prefer it). Copy the generated outline, then write real content.
Yes. Use the Intent selector. "Listicle" produces numbered, parallel-structure H2s. "Ultimate Guide" produces hierarchical H2 + H3 combos. "How-To" produces sequential step-based headers.
Yes, the AI weaves your title's main noun phrase into 40-60% of the H2s (not all. Over-stuffing hurts ranking). Exact placement is natural; don't expect it in every header.
Yes. Pick "Academic" tone. The output works well as chapter subheadings, thesis section breakdowns, and literature review structure.
The Topic Generator gives you post titles. This tool gives you the structure underneath one title. Use them in sequence: topic → title → subheadings → sections.
Yes. Hit Generate again. Each run produces a fresh outline with different angle. Run 2-3 times and merge the best subheadings.
Yes, for major languages (Spanish, French, German, Italian, Portuguese, Hindi, Dutch, Japanese). Put your title in the target language; output matches.
No. The title is sent to the model, processed in memory, and discarded. Nothing logged or used for training.
Yes. Just delete them from the generated list. The AI errs on the side of completeness. Removing 2-3 tangential H2s is normal. Focus the post by trimming.

Reviewed by the Grigora editorial team · Last updated November 2026

H2-count data comes from our Jan-Mar 2026 featured-snippet study (n=3,100 queries where Grigora content ranked top-3). Our editorial team uses this tool to outline every pillar post before drafting.

Your input is never stored. We process, return, and discard.