Free tools
Tools
Free, no-signup tools for AI search, SEO and shipping Next.js
- 10Free tools
- 0Signups
- 0Pages stored
llms.txt generatorRead a public sitemap and write an llms.txt file grouped into sections, plus an optional llms-full.txt.AI searchFreeOpen tool →
AI SEO checkerCheck crawler rules, llms.txt, structured data, and the on-page signals AI search uses.AI searchFreeOpen tool →
Free OG image generatorCompose a 1200×630 card, watch it update, then download the PNG or copy the Next.js file.Social previewsFreeOpen tool →
JWT decoderPaste a JSON Web Token and read the header and payload in the browser. The signature is not verified.Auth debuggingFreeOpen tool →
robots.txt checkerRead allow and disallow rules, sitemap links, and the mistakes that make a robots.txt file lie.AI searchFreeOpen tool →
Meta tags inspectorRead title, description, canonical, robots, Open Graph, Twitter, and JSON-LD types from one public URL.Social previewsFreeOpen tool →
JSON-LD schema generatorFill a form, get valid schema.org JSON-LD for Article, FAQ, Product, Organization and more.SEOFreeOpen tool →
AI token counter and cost calculatorCount tokens and estimate the API cost of a prompt for GPT, Claude and Gemini models, in your browser.AI devFreeOpen tool →
Cron expression builderBuild or paste a cron schedule, read it in plain English, and see the next run times in your timezone.DeveloperFreeOpen tool →
Next.js Dockerfile generatorGenerate a production multi-stage Dockerfile for Next.js with npm, pnpm, yarn or bun, plus .dockerignore and compose.Next.jsFreeOpen tool →
What these tools do
Free developer and AI-search tools: robots.txt, llms.txt, schema, meta tags, tokens, cron, JWT, Dockerfile and OG images. The llms.txt generator reads a public sitemap. The AI SEO checker scores one URL. The Open Graph image generator designs a 1200×630 preview. The JWT decoder reads a token in the browser and does not verify the signature. The robots.txt checker lists Allow and Disallow rules. The meta tags inspector reads title, social tags, and JSON-LD types. The schema generator writes JSON-LD, the token counter prices a prompt, the cron builder explains a schedule, and the Dockerfile generator writes a multi-stage Next.js image.
Checkers that fetch a URL stay on public http and https. After DNS resolution, private, loopback, and link-local addresses are refused. The generators and calculators run in your browser and do not send the text you paste.
FAQ
Are these tools free?
Yes. The tools run in the browser against this site, with no account and no fee.
Do you store the sites I check?
No. A run fetches public pages, builds the result, and returns it. The pages are not saved.
What can the tools fetch?
Public http and https URLs only. After DNS resolution, private, loopback, and link-local addresses are blocked. Requests time out, responses are size-capped, and each visitor is rate limited.