Five Developer Tool Workflows for Everyday Tasks

When an API response arrives as one long line, paste a non-sensitive sample into the JSON Formatter and choose Format. For example, {"ok":true,"items":[1,2]} becomes a multi-line object that is easier to inspect. A trailing comma or single-quoted string is invalid JSON; correct the input rather than treating the formatter as a schema checker.

A JWT decoder can display the token's header and payload so you can inspect fields such as exp and iss. Decoding only reverses Base64URL encoding: it does not verify the signature, establish who issued the token, or make an untrusted token safe to use. Use a test token, and never share a live credential.

Use Base64 when a text-only format must carry bytes, such as a small Data URI or an API field defined to contain Base64. It is an encoding, not encryption or compression, and adds overhead. UTF-8 text needs byte-aware encoding; the Base64 Converter handles Unicode text instead of passing arbitrary characters directly to btoa().

Enter a pattern and representative text in the Regex Tester, then check both matches and non-matches. Include empty strings, punctuation, newlines, and long inputs where relevant. A successful sample match is not proof that a pattern is correct for all inputs or safe from excessive backtracking.

Use the CSS Grid Generator to adjust rows, columns, gaps, and alignment while watching the preview, then copy the CSS into a project and test it at the target viewport sizes. Generated styles are a starting point; the tool does not know your container size, breakpoints, or surrounding design system.