Every developer keeps a handful of small utilities one tab away: a JSON formatter to make an API response readable, a minifier to ship smaller assets, a diff tool to see what changed. This category collects those everyday helpers in one place — no install, no extension.

They're handy whether you're debugging a payload, prepping data or reviewing a change, and they run locally so your code and data stay on your machine.

Tools in this category#

• JSON Formatter — Beautify or minify JSON instantly, with validation as you type.
• Code Beautifier — Format and indent JavaScript, CSS or HTML.
• Code Minifier — Minify JavaScript, CSS or HTML to shrink file size.
• CSV ⇄ JSON Converter — Convert CSV to JSON or JSON to CSV.
• Diff / Compare Text — Compare two texts and see a unified diff of changes.
• Syntax Highlighter — Highlight code with automatic language detection.

From debugging to data wrangling#

Pasting an ugly API response? The JSON formatter makes it readable and flags syntax errors. Shipping front-end assets? Minify them. Migrating data between a spreadsheet and an app? Convert CSV ⇄ JSON. Reviewing two versions of a config? The diff tool shows exactly what moved.

Tip: validating JSON before you paste it into code saves a surprising amount of debugging — the formatter catches the missing comma so you don't have to.