Stop re-searching the same things — convert chmod permissions, look up HTTP status and MIME types, generate a .gitignore or bcrypt hash, and check WCAG contrast. Free browser dev utilities.
Half of development is remembering the small stuff: what a Linux permission number means, which HTTP status to return, the MIME type for a file, or the right lines to drop in a .gitignore. Instead of searching for the same reference again, keep these quick developer utilities bookmarked — each answers one question or generates one thing instantly, free and in your browser.
Reference tools that turn “what was that again?” into an instant answer:
| Tool | Answers |
|---|---|
| Chmod Calculator | Convert between rwx permissions and octal (e.g. 755) |
| HTTP Status Codes | What 301, 403, 418, or 502 mean and when to use them |
| MIME Type Lookup | The correct Content-Type for any file extension |
Produce the boilerplate you'd otherwise copy from an old project:
Before you ship a colour scheme, confirm text is actually readable with the WCAG Contrast Checker — it scores foreground/background pairs against the AA and AAA contrast thresholds so your UI passes accessibility audits and works for low-vision users.
.gitignore beats a half-remembered one that leaks node_modules into a repo.Pair these with the CSS generators & code formatters guide for the visual and formatting side of front-end work.
Chmod, HTTP status, and MIME lookups answer the recurring questions; the .gitignore and bcrypt generators produce boilerplate on demand; and the WCAG contrast checker keeps your UI accessible. A small, sharp reference shelf — all free and private in your browser.