SEO utilities
Accessibility Contrast Checker documentation
Check WCAG contrast ratios, review APCA guidance, and preview text, links, and buttons before launch.
Browse the published guides below and see what playbooks are being drafted next.
Filter guides by title, summary, category, status, or tag without leaving the page.
SEO utilities
Check WCAG contrast ratios, review APCA guidance, and preview text, links, and buttons before launch.
Data toolkit
Encode or decode Base64 with wrap presets, URL-safe toggles, and binary-aware previews.
Content helpers
Normalize copy, identifiers, and config keys with case presets.
Data toolkit
Compare checksum values with normalization controls and mismatch diagnostics.
Data toolkit
Beautify or minify HTML, CSS, JavaScript, and SQL with copy-ready output.
Data toolkit
Translate raw seconds into readable durations with TTL presets and copy-ready summaries.
Data toolkit
Turn calendar-style durations into total seconds with a compact workflow and quick validation checks.
Content helpers
Track word counts, characters, lines, and reading time.
Data toolkit
Decode cron syntax, preview run windows, and grab copy-ready scheduler snippets.
Data toolkit
Spot unused selectors, build safelists, and copy purge-ready tokens.
Data toolkit
Move between CSV exports and JSON arrays with delimiter controls and row stats.
Data toolkit
Generate Unix timestamps from calendar dates and times with timezone-aware output.
Network tools
Check core DNS records for a public domain and review grouped answers by record type.
Content helpers
Handle URL encoding, raw URL encoding, and HTML entities.
Content helpers
Extract URLs, emails, hashtags, mentions, and numbers.
Image utilities
Generate favicon bundles, manifest files, and download-ready assets from one upload.
Data toolkit
Generate digests, compare reference hashes, and reuse curated presets.
SEO utilities
Build Cache-Control recipes or explain pasted header values with TTL math and companion header guidance.
Network tools
Inspect final response headers, prioritize security coverage, and review cache, compression, and robots signals.
Image utilities
Convert uploaded images into Base64 strings or data URIs with preview metadata.
Image utilities
Use the shared converters hub and pair routes to move between common image formats.
Data toolkit
Validate, pretty-print, and minify JSON payloads with copy-ready output.
Data toolkit
Decode token claims, verify HMAC signatures, and audit expiry windows.
Content helpers
Number lines and control blank rows.
SEO utilities
Preview search and social metadata cards before you publish.
SEO utilities
Generate title, description, canonical, Open Graph, Twitter, and robots tags.
Content helpers
Generate passwords with presets and custom character sets.
Network tools
Convert Unicode hostnames to ASCII punycode and decode punycoded labels back to readable Unicode.
Content helpers
Escape regex metacharacters before you paste a literal string into a pattern.
Network tools
Encode bare text as raw punycode or decode bare punycode lines back to Unicode without hostname parsing or xn-- prefixes.
SEO utilities
Inspect redirect chains hop by hop and confirm final destinations.
SEO utilities
Compare redirect chains before launch.
SEO utilities
Compare pasted robots.txt snapshots or fetch live files from public URLs.
SEO utilities
Generate robots.txt files with path rules, host directives, and sitemap lines.
SEO utilities
Generate JSON-LD for common page, article, and product schema types.
Content helpers
Add or strip slashes for copied text.
Content helpers
Generate URL slugs and compare naming styles before publishing.
Content helpers
Sort, reverse, and mirror lists with simple controls.
Network tools
Inspect the leaf TLS certificate for a public hostname and review SAN coverage, issuer details, and expiry status.
SEO utilities
Validate JSON-LD schema markup and review repair hints.
Content helpers
Compare two text blocks and copy a unified patch.
Data toolkit
Convert Unix timestamps into readable datetimes with timezone highlights and copy-ready snippets.
Data toolkit
Generate UUID batches and share checksum evidence with the result.
Content helpers
Trim edges, remove duplicates, and control blank lines.
Network tools
Look up registrar, dates, statuses, nameservers, and raw WHOIS text for a public domain.
SEO & webmaster
Bulk upload URLs and generate XML sitemap output.
Data toolkit
Convert YAML and JSON with clear workflow steps, structure checks, and indentation guidance.