Code Utilities

Free online code utilities that work in your browser. No signup needed - find the right tool for your workflow.

Browse all toolsCode FormatterTimestamp ConverterCSV to JSON

Code Formatter

Format JSON, HTML, CSS and JavaScript

Code Utilities

Timestamp Converter

Convert Unix timestamps and datetime

Code Utilities

CSV to JSON

Convert CSV text into JSON array

Code Utilities

Query String Parser

Parse and build URL query strings

Code Utilities

JSON to CSV

Convert JSON array into CSV text

Code Utilities

Unit Converter

Convert length, weight and temperature units

Code Utilities

CSV ↔ JSON Converter

Convert between CSV and JSON formats

Code Utilities

JSON ↔ YAML Converter

Convert between JSON and YAML formats

Code Utilities

Percentage Calculator

Calculate common percentage scenarios quickly

Code Utilities

Random Number Generator

Generate random numbers within a range

Code Utilities

BMI Calculator

Calculate BMI using height and weight

Code Utilities

Number Base Converter

Convert between binary, octal, decimal and hex

Code Utilities

Cron Expression Parser

Parse cron expressions to human-readable text

Code Utilities

JSON Path Evaluator

Evaluate JSONPath expressions on JSON data

Code Utilities

Meta Tag Generator

Generate HTML meta tag code for SEO

Code Utilities

robots.txt Generator

Generate robots.txt content visually

Code Utilities

Age Calculator

Calculate age, total days, and next birthday from a birth date

Code Utilities

Loan Calculator

Calculate monthly payments, total interest, and early amortization rows

Code Utilities

Excel Column Converter

Convert between Excel column numbers and labels

Code Utilities

Chmod Calculator

Convert octal and symbolic file permissions

Code Utilities

Byte Converter

Convert B, KB, MB, GB, TB, and PB units

Code Utilities

Why start from this category

Code Utilities groups together a practical set of browser tools for developers, QA, and data processing tasks. This page is useful when you want to browse by workflow, compare tool intent, and build a smoother path across related tasks.

  • format conversion and developer helpers
  • less time writing throwaway scripts
  • coverage for everyday development tasks

Tool Choice and Privacy Notes

Category pages group tools from the same workflow so you can decide which utility fits the task before opening it. For sensitive text, files, or account-related material, prefer tools that process locally in the browser and review outputs before production use.

Common questions

How should I use the Code Utilities page?

If you are not sure which tool to open first, start from the Code Utilities category page and narrow down by use case.

Why group related code utilities tools together?

Category pages make internal navigation stronger and help people discover adjacent tools without searching again.

Is this Code Utilities page worth bookmarking?

Yes. For recurring workflows, the category page is often a better entry point than remembering a single tool URL.

Explore more categories

If the tools in this category don't fully match your task, explore adjacent categories to find a more complete workflow.

Text ToolsAudio & Video ToolsPDF ToolsEncoding & Security