glunty 66 tools in this category. Each runs in your browser.
Reference tools answer a specific factual question fast: what does HTTP 422 mean, which MIME type does a .webp file use, what is the event.code for the left arrow key, what octal matches rwxr-xr-x, or which control character is decimal 27. You could search the web for each of these, but a focused table that loads instantly and filters as you type is quicker and stays out of your way.
The HTTP status code reference lists every standard code by class, with a plain-sentence meaning and a filter that matches a number or a phrase. The MIME type reference looks up media types by either the type string or the file extension, so it works whichever end you start from. The ASCII table shows all 128 code points with their decimal, hex, octal, and binary values and the names of the control characters. The keycode tester reports the modern event.key and event.code for any key you press, alongside the legacy keyCode. The chmod calculator turns permission checkboxes into the octal and symbolic forms and back.
Everything renders in your browser from data baked into the page, so the tables work offline once loaded and nothing you type is sent anywhere. Pick a reference below and start typing to filter.
The ideas behind these tools, in plain English.
HTTP status codes group by first digit: 2xx means success, 3xx redirection, 4xx a client error, and 5xx a server error.
The class tells you at a glance whether to fix your request or look at the server, speeding up debugging.
A MIME type is a two-part label like text/html or image/png that tells software what kind of content it is handling.
Browsers and APIs rely on it to render, download, or reject content, so a wrong type can break uploads and display.
ASCII assigns numbers 0 to 127 to letters, digits, and punctuation, with the first 32 reserved as non-printing control characters like newline and tab.
Control characters shape how text and terminals behave, and understanding them explains invisible bugs in data and logs.
Unix permissions grant read, write, and execute to the owner, group, and others, commonly written as three octal digits such as 755.
Each octal digit sums 4, 2, and 1 for those rights, so reading it correctly is how you fix access and security issues.
Search every standard HTTP status code by number or name.
Look up media types by MIME string or file extension.
All 128 ASCII codes: decimal, hex, octal, binary, names.
Press any key to see event.key, event.code, and keyCode.
Toggle rwx bits to get octal (755) and symbolic form.
Search 450+ emoji by name, click to copy and paste.
Searchable regex reference: tokens, quantifiers, and ready-made patterns.
Searchable reference of common git commands and what each one does.
Searchable reference of common bash shell commands and syntax.
Searchable standard SQL syntax reference, filter by category.
Searchable cron syntax and schedule examples.
Searchable CommonMark and GitHub Flavored Markdown syntax reference.
Searchable Docker CLI and Dockerfile command reference.
Searchable CSS flexbox property reference with layout recipes.
Searchable reference of JavaScript array methods.
Searchable list of HTTP request, response, and security headers.
Searchable curl command reference with what each flag does.
Searchable Vim keystroke reference that runs in your browser.
Searchable CSS Grid properties, values, and layout recipes.
Searchable Kubernetes kubectl command reference.
Searchable tmux keybinding and command reference.
Searchable PostgreSQL reference: psql, queries, JSONB, and admin.
Searchable npm CLI command reference.
Searchable ffmpeg command reference for audio and video.
Searchable SSH reference: keys, config, tunnels, and file transfers.
Search well-known TCP and UDP ports by number, service, or protocol.
Searchable Python 3 syntax reference that runs in your browser.
Searchable sed and awk one-liner reference.
Searchable PowerShell cmdlet and syntax reference.
Searchable reference of TypeScript utility types like Partial and Pick.
Searchable reference of common Redis commands.
Searchable YAML syntax reference that runs in your browser.
Searchable grep command cheat sheet.
Searchable reference of every CSS unit and what each one does.
Searchable Go language syntax reference that runs in your browser.
Searchable Rust syntax, ownership, and error handling reference.
Searchable Docker Compose CLI and compose-file key reference.
Search GNU make rules, variables, and functions in your browser.
Searchable JSON Schema keyword reference.
Searchable Linux find command reference that runs in your browser.
Search Emmet HTML and CSS abbreviations and what they expand to.
Searchable nginx config directive reference with plain-English notes.
Searchable Java syntax reference with plain explanations.
Searchable PHP syntax cheat sheet: arrays, strings, control flow, OOP.
Searchable C# syntax reference: types, LINQ, records, async.
Searchable Sass and SCSS syntax reference.
Searchable GraphQL schema and query syntax reference.
Searchable mongosh and query API command reference.
Searchable Terraform CLI and HCL reference.
Searchable list of React hooks with plain-English notes.
Searchable modern C++ syntax reference.
Searchable Ruby syntax reference that runs in your browser.
Searchable Kotlin reference: null safety, collections, classes.
Searchable Swift syntax reference that runs in your browser.
Searchable reference of DNS record types and what each one does.
Searchable reference of HTML elements by tag name and purpose.
Searchable HTTP methods with safe, idempotent, and REST notes.
Searchable Apache htaccess directive reference.
Searchable JavaScript syntax reference that runs in your browser.
Searchable TypeScript syntax reference that runs in your browser.
Searchable MySQL 8 command reference with plain-English notes.
Searchable systemctl, journalctl, and unit file reference.
Search Ansible commands, playbook keys, modules, and Jinja vars.
Searchable jq filter reference that runs in your browser.
Searchable CIDR, subnet mask, IP range, and IPv6 reference.
Search GNU Emacs keyboard shortcuts in a fast client-side cheat sheet.