Analyzers

View and sort CSV files in an interactive table without uploading to a server — search, filter, sort columns, and see column statistics instantly

Upload or paste CSV data and generate bar, line, pie, or scatter charts client-side — customize colors, title, and labels, then download as PNG — Free online chart builder

Paste a CSV or JSON column and detect whether values are strings, integers, floats, dates, booleans, emails, URLs, UUIDs, and more — generates SQL and TypeScript types instantly

Check meta description length, title tags, Open Graph, and 15+ SEO signals instantly. Paste your HTML and get a scored audit with fix recommendations - Free online meta description checker

Analyze keyword overlap risk, repeated topic clusters, and term concentration signals to identify potential keyword cannibalization issues - Free online keyword cannibalization checker

Analyze JavaScript bundle reports to detect oversized chunks, heavy initial payloads, source-map exposure, and optimization opportunities with actionable guidance - Free online JavaScript bundle bloat analyzer

Find the likely Largest Contentful Paint resource from Lighthouse and performance logs with confidence scoring and targeted optimization guidance - Free online LCP resource finder

Diagnose Time To First Byte bottlenecks from Lighthouse, PageSpeed, and server diagnostics with actionable backend, cache, CDN, and network fixes - Free online TTFB analyzer

Detect CSS, JavaScript, and font assets that block rendering with prioritized fix guidance for critical request chains and first paint improvements - Free online render blocking resource detector

Analyze image diagnostics for oversized assets, format opportunities, LCP image pressure, and layout stability risks with actionable optimization guidance - Free online image optimization checker

Analyze web font loading diagnostics for render-blocking chains, FOIT/FOUT risks, heavy font payloads, and preload/font-display/caching gaps with actionable fixes - Free online web font loading analyzer

Analyze response caching headers for policy conflicts, low hit-rate signals, weak revalidation strategy, and CDN/browser cache inefficiencies with actionable fixes - Free online caching header analyzer

Analyze HTTP response headers for missing or misconfigured security headers. Check CSP, HSTS, XSS, Frame options, Referrer, and Server info leakage with configuration snippets - Free online tool

Analyze service worker registration diagnostics for scope mismatches, HTTPS requirements, script MIME issues, response status problems, and cache update delays - Free online service worker debugger

Analyze tsconfig.json for strictness gaps, module and path alias risks, project-health issues, and actionable fix suggestions - Free online tsconfig analyzer

Analyze package.json dependency strategy, script risk posture, deprecated packages, and project-health settings with actionable fix suggestions - Free online package.json dependency checker

Analyze lockfile merge conflicts for yarn.lock, package-lock.json, and pnpm-lock.yaml with helper-merged output, malformed marker detection, and actionable recovery guidance - Free online lockfile conflict resolver helper

Analyze package.json scripts for dangerous patterns, missing project-health scripts, lifecycle-hook risk, and maintainability issues with actionable fixes - Free online npm scripts validator

Analyze package.json workspaces configuration for unsafe globs, monorepo script-health gaps, and deterministic Yarn setup issues with actionable fixes - Free online Yarn workspaces validator

Analyze tsconfig path aliases for wildcard mismatches, unsafe target mappings, and monorepo import-resolution risks with actionable fixes - Free online monorepo path alias validator

Analyze directed module edges to detect circular import cycles, coupling hotspots, and graph health issues with actionable diagnostics - Free online circular dependency detector

Analyze declared and referenced environment variables to detect missing keys, runtime configuration gaps, and project-health risks with actionable fixes - Free online missing env variable detector

Analyze environment variable value types using schema rules or naming heuristics to detect config type mismatches and runtime risks with actionable fixes - Free online env key type validator

Analyze feature flag rule definitions for rollout range correctness, owner metadata, expiry hygiene, and governance quality with actionable fixes - Free online feature flag rule validator

Analyze A/B experiment configuration for split integrity, rollout policy safety, ownership gaps, and governance quality with actionable fixes - Free online A/B test configuration validator

Analyze text and background color combinations from HTML and CSS for WCAG AA contrast compliance with pass/fail ratios, issue breakdowns, and actionable recommendations - Free online accessibility contrast checker

Analyze HTML landmark structure and ARIA landmark roles. Detect missing main, navigation, header, and footer landmarks with actionable accessibility recommendations - Free online accessibility landmark checker

Analyze HTML forms for missing labels and ARIA naming gaps. Detect unlabeled input, select, and textarea controls with actionable accessibility recommendations - Free online accessibility form label checker

Analyze keyboard navigation accessibility in HTML. Detect click-only interactions, positive tabindex anti-patterns, and focus visibility concerns with actionable recommendations - Free online accessibility keyboard navigation tester

Analyze internal links in HTML and detect broken fragment targets, placeholder anchors, and duplicate ID issues that can hurt navigation and SEO - Free online broken internal link checker

Analyze outbound links in HTML and detect malformed URLs, insecure HTTP links, and external link quality issues that can hurt trust and SEO - Free online broken external link checker

Analyze HTML email markup for unsupported tags, risky CSS, insecure links, and cross-client compatibility concerns - Free online HTML email compatibility checker

Analyze AdSense readiness signals including legal pages, consent indicators, ads.txt/app-ads.txt coverage, and technical foundations with weighted scoring and blocker detection - Free online AdSense precheck

Preview how your page appears when shared on Facebook, X (Twitter), LinkedIn, WhatsApp, Slack, and Discord. Check og:title, og:description, og:image, Twitter Cards with a scored report - Free online OG preview tool

Check your favicon implementation for completeness and cross-platform compatibility. Validate ICO, PNG, SVG, Apple Touch Icon, Web App Manifest, Safari mask icon, Microsoft tiles, theme color, and sizes - Free online favicon checker

Browse tables, view schemas, and execute raw SQL queries client-side on SQLite database files online. 100% private, local, and free.

Render any JSON array of objects as an interactive sortable table — search, filter, sort by column, and export as CSV. Free online JSON to table tool.

Paste any Excel or Google Sheets formula and get a plain-English explanation instantly — supports IF, VLOOKUP, XLOOKUP, SUMIFS, INDEX/MATCH, and 100+ functions. Free online formula explainer.

Parse, search, filter, and inspect huge NDJSON and text log files online page-by-page. 100% local, crash-proof, and private.

Transform regular expressions into interactive railroad diagrams, explore the AST breakdown, and test live matches — Free online regex visualizer

Parse any URL into protocol, host, path, and query components, edit parameters in a visual grid, and rebuild clean URLs — Free online URL parser

Convert CSV data into a styled, sortable, and searchable HTML table with pagination and HTML export — Free online CSV to table converter

Summarize and pivot CSV data into a grouped cross-tabulation table with sum, count, average, min, max, and count distinct aggregations — Free online pivot table generator

Estimate Protobuf wire size vs equivalent JSON — per-field type inference, byte breakdown, and JSON+GZIP vs Protobuf+GZIP comparison. Free online protocol buffer size estimator, no signup required.

Calculate whether HTTP compression is worth the CPU cost given TTL, cache hit rate, and traffic volume — models bandwidth savings vs CPU overhead for GZIP, Brotli, DEFLATE, and Zstandard. Free online compression planner, no signup required.

Paste HTML and analyze total weight — breaks down inline CSS, inline JS, base64 images, SVGs, and comments with GZIP and Brotli compression estimates and optimization recommendations. Free online HTML page weight analyzer, no signup required.

Paste a @font-face CSS block and analyze font formats — detects missing WOFF2, legacy EOT/SVG formats, missing font-display, GDPR issues, and generates an optimized CSS output. Free online web font delivery optimizer, no signup required.

Analyze a QR code payload and calculate the required QR version — suggests compression strategies (uppercase conversion, URL shortening, EC level reduction) to reduce QR complexity. Free online QR code data size optimizer, no signup required.

Count sentences in any text block instantly with abbreviation-aware and decimal-aware boundary detection. View a numbered sentence list, copy a report, and analyze word and paragraph counts — Free online sentence counter.

Paste your speech or script and instantly calculate delivery time at slow (100 WPM), average (130 WPM), and fast (160 WPM) speaking speeds. Custom WPM support included — Free online speaking time estimator.

Count paragraphs in any text block instantly with blank line detection, line-break mode, and detailed writing metrics. View a numbered paragraph list, copy a report — Free online paragraph counter.

Remove duplicate lines from any text block instantly with case-sensitive or insensitive matching, keep first or last occurrence, and whitespace trimming. Free online duplicate line remover — no signup required.