# realserp

> Free, 100% client-side SERP and SEO toolbox. A pixel-accurate Google snippet simulator, standalone title and meta-description pixel checkers, a JSON-LD generator, a social card previewer, an llms.txt generator, a robots.txt AI-crawler checker, and a CTR-by-position estimator, all backed by dated, sourced reference pages. The real SERP, AI Overviews included. Nothing a user types, pastes, or uploads leaves the browser.

realserp measures the rendered pixel width of titles and descriptions the way Google truncates them, using one shared measurement engine so every tool agrees to the pixel. It is a static site with no accounts, no signup, and no server round-trip. Its reference pages are answer-first and dated, and keep the provenance of every figure they publish.

## Tools
- [SERP snippet simulator](https://realserp.com/): pixel-accurate Google result preview for mobile and desktop, with favicon, ratings, sitelinks, a date prefix, bolded query terms, and an AI Overview real-estate view.
- [Title tag pixel length checker](https://realserp.com/title-tag-checker): a title's real pixel width against Google's 2026 desktop (600px) and mobile (560px) budgets, side by side.
- [Meta description checker](https://realserp.com/meta-description-checker): description width in pixels and characters against the 2026 budgets, with a per-device line estimate and a date-prefix option.
- [JSON-LD schema generator](https://realserp.com/json-ld-generator): valid JSON-LD for ten schema types with a live preview and each type's honest 2026 rich-result status, including the dead FAQ and HowTo results.
- [Social share previewer](https://realserp.com/social-preview): X, Open Graph, LinkedIn, Slack, Discord and WhatsApp cards from pasted tags, each labelled verified or inferred, with no server fetch.
- [CTR by position estimator](https://realserp.com/ctr-by-position): organic click-through rate by Google position from five named studies, plus a click estimator with an AI Overview adjustment.
- [llms.txt generator and validator](https://realserp.com/llms-txt-generator): build a spec-compliant llms.txt from a form or validate a pasted one, in the browser.
- [robots.txt AI crawler checker](https://realserp.com/robots-txt-ai-checker): paste your robots.txt to see which AI crawlers are allowed or blocked, with the deciding rule for each.

## Reference
- [Title tag length in 2026](https://realserp.com/title-tag-length): the measured pixel limits, character equivalents, and how to fit a title Google is truncating.
- [Meta description length in 2026](https://realserp.com/meta-description-length): the measured pixel and character limits, why Google rewrites descriptions, and how to fit one.
- [SERP pixel widths](https://realserp.com/serp-pixel-widths): the measured 2026 truncation budgets, the render fonts, the measurement method, and the sources.
- [What is llms.txt](https://realserp.com/what-is-llms-txt): the definition, the format, the honest adoption and consumption picture, and real examples.
- [Every AI crawler in 2026](https://realserp.com/ai-crawler-list): the complete allow and block table with exact user-agent tokens, operators, purpose, and robots.txt policy.
- [AI Overview statistics 2026](https://realserp.com/ai-overview-statistics): sourced AI Overview CTR-impact and zero-click figures, each with its exact scope.
- [Methodology](https://realserp.com/methodology): how the numbers are measured, sourced, and kept current, and the privacy rules the tools follow.

## About
- [About realserp](https://realserp.com/about): who makes it, why it is client-side, and the affiliate disclosure.
- [Privacy](https://realserp.com/privacy): what stays in the browser, the single outbound request, and the analytics stance.
- [Contact](https://realserp.com/contact): how to report a correction, a bug, or a missing AI crawler.