Tools
Free utilities from Keep. Quick tools for developers, creators, and anyone working with content online.
llms.txt validator
Check your llms.txt file against the spec. Paste or point at a URL to get line-by-line errors, token counts, and a sibling llms-full.txt report.
Markdown for Agents checker
Paste any URL and get nine pass or fail checks for AI agent readiness. Content negotiation, .md variants, HTML and HTTP alternate links, plus llms.txt and MCP discovery.
Token counter for URLs
Count the LLM tokens in any webpage. Compare the raw HTML cost to the Markdown version and see how many tokens an AI agent saves when a site is Markdown-ready.
Twitter search without an account
Search X (Twitter) without logging in. Type a query or paste operators like from:, min_faves:, since:, lang:, filter:replies and see real results on one page.
X thread unroller
Paste any tweet from an X (Twitter) thread to unroll the whole thing into one clean reading view. Copy as Markdown or download as .md, .txt, or .json.
Tweet to image
Paste an X post URL and download a clean PNG of the tweet. Light, dim, or dark theme. Square, landscape, or portrait for any social platform.
X (Twitter) photo resizer
Resize any image to the correct X banner, profile photo, in-stream post, or Twitter Card size. Pure client-side, nothing is uploaded.
X video downloader
Paste any X (Twitter) post URL to download the video or GIF as an MP4. Every available quality, no watermark, no login.
YouTube video ID finder + embed URL
Paste any YouTube watch URL, youtu.be share link, or Shorts URL to get the 11-character video ID, embed URL, iframe code, and thumbnail URLs.
OPML viewer and validator
Paste or drop an OPML file to preview every RSS feed it carries, check the file parses cleanly, and download a normalized copy.
AI text cleaner
Strip emdashes, curly quotes, invisible Unicode, and Markdown formatting from ChatGPT, Claude, or Gemini output.
LinkedIn text formatter
Turn plain text into bold, italic, underlined, or monospace Unicode for LinkedIn posts, headlines, and profiles.
Twitter advanced search builder
Build an X search URL with every operator: from:, to:, min_faves:, since:, until:, lang:, filter:replies, and more.
Twitter card validator
Preview how any URL renders as a card on X (Twitter) and check the og: and twitter: meta tags.
Twitter character counter
Live character count for X (Twitter) with support for the 280 standard limit and the 25,000 X Premium long post limit.
Twitter ID to username + snowflake decoder
Reverse-lookup any X user ID to its @username and decode the snowflake creation timestamp.
URL cleaner
Strip UTM tags, fbclid, gclid, igshid, and other tracking parameters from any link. Bulk mode supported.
URL to Markdown
Convert any webpage into clean, AI-ready Markdown. Title, body, headings, and links preserved. Nav and ads stripped.
YouTube channel ID finder + RSS feed
Paste a YouTube URL, @handle, or video link to get the channel ID and the RSS feed URL ready to drop into any feed reader.
Twitter ID finder
Get the numerical user ID for any X (Twitter) account from a @username or profile URL.
Twitter profile picture downloader
View and download the full-size avatar (PFP) and banner for any X (Twitter) account.