Developer tools

Developer tools focus on formatting, encoding, and inspection tasks you often need while building or debugging. Format JSON, XML, SQL, HTML, CSS, JavaScript, or YAML; encode Base64 or URLs; decode JWTs; generate UUIDs; compare documents; or test regular expressions against sample text.

Each utility is meant to be fast and self-contained. Paste a snippet, transform it, and copy the result. Nothing requires a backend service for these formatters and encoders. Invalid input should surface a clear error rather than a silent failure.

JWT decoding shows header and payload claims only. It does not verify signatures or prove a token is trusted, unexpired, or issued by a known party. Treat decoded tokens as readable data, not authentication proof. Hash and checksum tools use browser cryptography APIs for local digests.

Avoid pasting production secrets into any public browser tab on a shared computer. Even though Utilnivo does not upload your snippets, the browser environment itself may retain history or clipboard data.

Formatters aim to preserve meaning while improving readability or compactness. Minify modes remove unnecessary whitespace; pretty-print modes add indentation. Compare tools highlight structural differences so you can review config or API payload changes before deploying. Regex Tester uses JavaScript regular expression semantics, including common flags.

Cron Explainer translates schedule expressions into plain language so you can double-check jobs before production. Timestamp Converter helps move between Unix timestamps and human-readable dates. Use these pages as quick utilities during development, not as a full IDE replacement.

Bookmark the tools you use most and keep sensitive tokens out of screenshots or shared sessions. Clear the page when you finish working with secrets.