Code formatting, conversion, and debugging tools
This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.
Real-world use
Leave with code, JSON, schema, or command text you can paste into your editor or docs.
Format and validate structured data
Generate safe IDs, hashes, and snippets
Prepare API and debugging handoffs
Format and validate JSON online: prettify large pasted payloads, minify for APIs, and catch syntax errors before deployment.
Convert JSON to Go struct definitions with tags and options.
Convert JSON to TypeScript interfaces or types.
Convert between JSON and YAML formats with preserved structure.
Convert CSV files to JSON and JSON to CSV with custom delimiters.
Format and beautify SQL queries with syntax highlighting.
Format and validate JSON online: prettify large pasted payloads, minify for APIs, and catch syntax errors before deployment.
Convert JSON to Go struct definitions with tags and options.
Convert JSON to TypeScript interfaces or types.
Convert between JSON and YAML formats with preserved structure.
Convert CSV files to JSON and JSON to CSV with custom delimiters.
Format and beautify SQL queries with syntax highlighting.
Generate API keys, secure tokens, passwords, and cryptographic keys with customizable formats.
Convert Unix timestamps (seconds/milliseconds) to human-readable dates and vice versa.
Convert time between different timezones worldwide.
Base64 encode or decode text and files in-browser—handy for APIs, data URIs, and debugging without installing a CLI.
URL encode (percent-encode) or decode strings for safe web transmission.
Generate UUID v4/v7 IDs for databases and APIs. Copy RFC-4122 style unique identifiers instantly—no account required.
Convert between bytes, KB, MB, GB, TB, PB with precision.
Debug JavaScript-style regular expressions with live matches and capture groups—paste sample text and tune patterns interactively.
Generate SHA-1, SHA-256, SHA-384, SHA-512 cryptographic hash values from any text.
Decode and inspect JWT (JSON Web Token) header, payload, and signature without server-side verification.
Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
Encode special characters to HTML entities and decode HTML entities back to plain text.
Parse and explain cron expressions in plain English. Understand scheduling syntax instantly.
Convert HTML snippets or pages to Markdown in your browser.
Parse or rebuild YAML front matter for blog posts and static-site Markdown.
Format, beautify, or minify HTML code. Clean up messy HTML with proper indentation.
Minify and compress CSS code by removing comments, whitespace, and redundant characters to reduce file size.
Fake names, emails, phones, and addresses for mockups. example.com only; all generated locally.
Paste JSON arrays or CSV with headers; convert both ways using PapaParse locally.
Replace text with regex and capture groups ($1, $2…). Preview-safe, all client-side.
Compare two JSON documents and list added, removed, changed, and unchanged paths.
Format XML, validate parser errors, and view a readable indented version.
Beautify JavaScript code with indentation and simple statement line breaks.
Minify JavaScript snippets by removing comments and unnecessary whitespace without executing code.
Preview HTML snippets in a sandboxed iframe and copy the source.
Generate Markdown tables from CSV-like text, pasted rows, or quick column settings.
Generate unsigned, HS256, or decoded-demo JWT strings for local testing and documentation.
Build cURL and fetch snippets from method, URL, headers, and JSON body without proxying the request.
Build cron expressions from common schedules and explain existing five-field cron strings.
This developer tools collection includes 35 maintained tools for code formatting, conversion, and debugging tools. The goal is to keep routine work fast: open the tool, complete the task, and leave with copy-ready text or a downloadable result.
We prioritize tools that solve a specific task clearly instead of turning the page into a directory of vague links. The first cards in this category highlight the most broadly useful paths, while the full list covers related one-off tasks.
This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.
21 tools
24 tools
8 tools
9 tools
7 tools
14 tools
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13 tools
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10 tools
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7 tools