Turn Competitor Blogs and Your Own Site Into a Content Gap Analysis in Minutes.
Convert blogs, resource centers, and reference sites into clean Markdown for SEO briefs, topic cluster mapping, content audits, and brand-voice-grounded drafts in ChatGPT, Claude, NotebookLM, or RAG.
- 1 Enter URL
- 2 Download Markdown
- 3 Brief your LLM
Free to try • Pay-as-you-go from $0.04 per page.
Convert a blog or content site to Markdown
Google sign-in is required to start a conversion.
Plan content in the AI tools you already use
From twenty open tabs to a single content research corpus
SEO strategists and content managers spend more time collecting competitor articles and auditing their own archive than deciding what to publish next.
Tab overload in SERP analysis
Reading competitor posts one at a time makes it hard to see coverage, depth, and structure across a whole topic.
Put a whole blog in one file and analyze it as a single corpus.
Brief drift and off-brand drafts
AI drafts and freelance briefs wander from your positioning, terminology, and tone when they don't have your real content as context.
Ground briefs and drafts in your own published pages.
Topical authority blind spots
You can't easily see which topic clusters a competitor has built out and where your own coverage is thin or duplicated.
Map both sites side by side and rank the gaps.
How SiteToMarkdown helps content and SEO teams
Give your AI tools the full text of the sites you're analyzing, so gap analyses, briefs, and audits are based on what has actually been published.
Content gap analysis
Compare a competitor's blog with yours to find topics, subtopics, and questions you haven't covered.
Topic clusters and pillar pages
Group posts into clusters, identify missing pillar pages, and plan supporting content to build topical authority.
SEO content briefs
Draft briefs with search intent, H2 outline, entities to cover, and internal link targets drawn from your own site.
Content audits of your own site
Find thin, overlapping, and outdated posts, cannibalization risks, and internal linking opportunities.
Brand voice and style guide grounding
Give writers and AI drafts your real terminology, tone, and structure as reference material.
Content refresh planning
Rerun conversions monthly to track what competitors publish and to spot decayed posts on your own site.
Start with one blog category or resource section, then expand.
From blog archive to content brief
Enter a blog or content URL
Paste a competitor's blog index, a category page, or your own blog. Do it for both sites to compare.
Review and convert the pages
Choose the posts you want from the discovered pages and combine them into one Markdown file per site.
Prompt your LLM
Add the files to ChatGPT, Claude, NotebookLM, or a RAG index and ask for the gap analysis, brief, or audit.
Prompts to run on your Markdown
Attach the files, paste a prompt, and swap in your target keyword, audience, and content types.
Content gap analysis
Using the two attached Markdown files (competitor blog and our blog), cluster each site's posts by topic and search intent (informational, commercial, transactional, navigational). List the topic clusters the competitor covers that we do not, note which clusters have a pillar page, and rank the gaps by how much supporting content the competitor has published. Give the post titles and URLs behind each cluster.
SEO content brief
Write an SEO content brief for the keyword [target keyword], aimed at [audience]: primary and secondary search intent, suggested H1 and H2 outline, questions to answer, entities and terms to cover, and the posts from our site (with URLs) that should be linked internally. Base the outline on what the attached competitor posts cover, note where we can add original experience, data, or expert quotes for E-E-A-T, and do not reuse competitor wording.
Content audit and internal links
Audit the attached Markdown of our blog. Flag thin posts, posts that target overlapping topics (cannibalization risk), and content that looks outdated. For each flagged page give the URL, the issue, and a recommendation: refresh, consolidate, or redirect. Then suggest ten internal links with source page, target page, and anchor text, favoring links from our strongest pages to pillar pages.
Brand voice and style guide
Read these posts and write a one-page voice and style guide: tone, point of view, sentence length, formatting habits, preferred and avoided terminology, and three do and don't examples quoted from the text. Write it as instructions to a writer, because I will use it as context when editing drafts.
Looking for more? Browse prompts for every use case in the prompt guide →
See the content corpus your LLM receives
Input: a competitor blog post
Sidebars, newsletter pop-ups, related-post carousels, and share buttons around the article text.
Output: clean Markdown
# Consolidated Markdown for https://example.com/blog
Generated at: 2026-09-23 14:05:00
---
## Page: https://example.com/blog/email-deliverability
# Email Deliverability: A Practical Guide
## What affects inbox placement?
Sender reputation, authentication (SPF, DKIM,
DMARC), and list hygiene ...
## How to fix a low sender score
1. Audit your sending domains
2. Remove inactive subscribers
3. Warm up new IP addresses
---Headings, lists, and body copy stay in order, and each post is headed with its URL, so your LLM can compare structure and coverage across the whole blog and point back to specific pages.
See an Example Markdown FileWhat you should know before converting
SiteToMarkdown converts publicly accessible web pages. Here's what applies to content and SEO work.
Pay per page
Review the discovered pages first and convert a category or a sample of posts before committing to a whole archive.
Content, not rankings
You get page text and structure. Search volume, rankings, and backlinks still come from your SEO tools.
Analyze, don't copy
Use competitor content for analysis and briefing. Don't republish or spin it.
Public pages only
Gated resources and pages behind a login are not crawled. Follow each site's terms of use.
Use it across your content workflow
ChatGPT
Briefs, outlines, and cluster maps from your converted files.
SiteToMarkdown for ChatGPT →Claude
Long-context audits and voice analysis across a full blog archive.
SiteToMarkdown for Claude →NotebookLM
A notebook per competitor or topic for cited research answers.
SiteToMarkdown for NotebookLM →RAG workflows
A searchable index of your own content for writers and internal linking.
SiteToMarkdown for RAG →API automation
Refresh competitor and own-site corpora on a schedule.
Read the SiteToMarkdown API docs →Pay-as-you-go pricing
Convert on demand from $0.04 per page with no subscription required.
See pricing →Frequently asked questions
How do I run a content gap analysis with AI?
Convert a competitor's blog, or the categories you care about, into one Markdown file, and convert your own blog the same way. Give both files to ChatGPT or Claude and ask it to cluster each site by topic and search intent, then list the topics the competitor covers that you do not. Treat the result as a starting point for keyword research in your SEO tool, not a replacement for it.
Can I audit my own website's content with it?
Yes. Convert your own blog or resource center and ask your LLM to flag thin, overlapping, or outdated posts, find pages that compete for the same topic, and list missing internal links. Because each page in the file is headed with its URL, findings map directly to pages you can edit, consolidate, or redirect.
Can it help me find internal linking opportunities?
Yes. With your whole blog in one Markdown file, an LLM can suggest which posts should link to a target page and propose anchor text based on what each post covers. Review the suggestions before publishing so the links make sense for readers and match your topic cluster and pillar page structure.
How do I keep AI drafts on brand voice?
Convert your best-performing posts, your style guide page, or your about and product pages, then ask the LLM to describe your tone, sentence patterns, formatting habits, and terminology. Use that description, or the file itself, as context when you brief or edit a draft. A human editor should still review every draft for accuracy and originality.
How often should I refresh the source files?
A monthly rerun is a reasonable cadence for competitor blogs, and you can rerun a section on demand before a quarterly content planning session or a refresh of decayed posts. Reruns can also be triggered through the SiteToMarkdown API. Conversion is charged per page, so start with the categories that matter most.
Is it okay to use competitor content this way?
Use the output for analysis and briefing, such as understanding topics, structure, depth, and gaps. Do not copy, spin, or republish a competitor's articles. That creates copyright problems and produces the kind of derivative content search engines discount. You are also responsible for following each site's terms of use, and only publicly accessible pages can be converted.
Find your content gaps before your next editorial calendar.
Convert competitor blogs and your own site into Markdown for gap analysis, SEO briefs, and content audits.
Free to try • Pay-as-you-go from $0.04 per page. Google sign-in required. No credit card needed to sign in.