Are these tables complete or just the common entries?

Complete. The HTTP table has every registered status code, the ASCII table all 128 characters including controls, and the colour reference all 148 named CSS colours. Truncated reference tables reliably omit the entry you were actually looking for, so nothing here is abridged.

Do these pages work offline?

Yes. Every table is static data rendered with the page, so once it has loaded it stays usable with no network — useful on a plane or inside an air-gapped environment.

How often are the maintained directories updated?

The free data APIs and MCP server directories are reviewed periodically and entries that have gone dead or moved behind a paywall are removed. If you find a broken or missing entry, the contact page is the fastest way to flag it.

Developer Reference Tables & Cheat Sheets

The lookup tables you open a dozen times a week, each searchable and on one page.

15 tools · Reviewed by Mimamsa, Founder & Engineer, CodeLint.Dev

This group exists for a narrow but constant need: you know a value exists, you need the exact spelling, and you need it in five seconds. What is 418 again? Is the MIME type for a .webp image image/webp or image/web-p? Which port does PostgreSQL listen on by default?

Every table here is searchable and complete — not a "top 20 most common" excerpt that omits the one entry you were looking for. They are static, so they load instantly and keep working offline once opened.

Two of them are maintained lists rather than fixed standards: the free data APIs directory and the free MCP servers directory. Those change as the ecosystem does, and they are the pages here most worth bookmarking.

Web & HTTP

HTTP Status Codes Every status code with its meaning, the RFC that defines it, and notes on when to use each rather than a near neighbour.MIME Types Media types mapped to file extensions in both directions, covering the full IANA registry.HTML Entities Named and numeric character references with a live preview of each rendered glyph.Port Numbers Well-known and registered TCP/UDP ports with the service on each and its transport protocol.

Text & encoding

Unicode Explorer Search by code point, name or character, with the UTF-8, UTF-16 and HTML encodings of each shown.ASCII Table All 128 ASCII characters in decimal, hex, octal and binary, including the control characters.Regex Cheat Sheet Every metacharacter, quantifier, class and assertion with a worked example for each.CSS Colour Names All 148 named CSS colours with their hex, RGB and HSL values and a rendered swatch.

Locale & geography

Country Codes ISO 3166 alpha-2, alpha-3 and numeric codes with calling codes, capitals and regions.Currency Codes ISO 4217 codes with symbols, minor-unit precision and the countries that use each.Language Codes ISO 639-1 and 639-2 codes with native and English names, for locale and hreflang work.Timezones IANA timezone identifiers with current UTC offsets and daylight-saving behaviour.

Tooling & ecosystem

Git Cheat Sheet Everyday commands plus the recovery ones you need under pressure — reflog, reset modes, and undoing a bad merge.Free Data APIs A maintained directory of genuinely free public APIs, with auth requirements and rate limits noted.Free MCP Servers A maintained directory of Model Context Protocol servers, with what each connects to and how to install it.

In-depth guides

Long-form articles covering the standards and formulas behind these tools.

Unicode and UTF-8 Explained: Everything Developers Actually Need to Know 10 min read July 27, 2026

Frequently asked questions

Are these tables complete or just the common entries?: Complete. The HTTP table has every registered status code, the ASCII table all 128 characters including controls, and the colour reference all 148 named CSS colours. Truncated reference tables reliably omit the entry you were actually looking for, so nothing here is abridged.
Do these pages work offline?: Yes. Every table is static data rendered with the page, so once it has loaded it stays usable with no network — useful on a plane or inside an air-gapped environment.
How often are the maintained directories updated?: The free data APIs and MCP server directories are reviewed periodically and entries that have gone dead or moved behind a paywall are removed. If you find a broken or missing entry, the contact page is the fastest way to flag it.

Other tool categories

Developer Tools The debugging tools you reach for when something almost works: a regex tester, a diff, a pattern generator, and a webhook inspector.Network & Security Four tools for the questions that come up when something works locally and fails in production.Encoders & Decoders Five encoders that turn data between representations — and, for JWTs especially, let you see what is actually inside.Generators & Utilities Generators and converters for the values you need constantly and should never have to fetch from a server.