Private browser-side helpers for day to day dev tasks.
Validate and format JSON in-browser with line and column hints, key sorting, and copy or download output.
Test JavaScript regex with full match indexes, group captures, runtime stats, and replacement preview.
Build cron expressions visually with presets, field editor, plain English summary, and next ten run times.
Decode JWT header and payload in-browser with expiry badges, claim notes, and optional HMAC signature checks.
Paste JSON to generate TypeScript interfaces, type aliases, or Zod schemas with nested types and optional fields.
Format SQL with indentation, keyword casing, and dialect-aware quoting for MySQL, PostgreSQL, BigQuery, and T-SQL.
Write Markdown with live HTML preview, GFM tables and task lists, sync scroll, and export to HTML or .md.
Compare two JSON objects with color-coded added, removed, and changed keys plus a copyable diff report.
Encode and decode Base64 with standard, URL-safe, MIME, UTF-8, file upload, and image preview.
Percent-encode and decode URLs, query strings, and path segments with RFC 3986 or form rules.
Bulk UUID v4, v5, and nil generator with uppercase, hyphen, SQL format, validation, and download.
MD5 and SHA family hashes plus HMAC for text or files with hex, Base64 output, and hash compare.
Bidirectional JSON and YAML conversion with validation, indent options, and anchor resolution.
Searchable HTTP status reference with causes, fix guidance, class filters, and RFC notes.