14 Free Online Tools

Developer Tools

Essential client-side utilities for programmers, web developers, and DevOps engineers. Format and validate JSON, encode/decode Base64, generate cryptographically secure hashes, and test regex.

Formatters

1 tools

Formatters 100% Private

JSON Formatter & Validator

Prettify, format, validate, and minify JSON with syntax highlighting and error markers.

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Validation

1 tools

Validation 100% Private

JSON Validator

Validate JSON syntax and identify exact error line and column numbers.

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Optimization

1 tools

Optimization 100% Private

JSON Minifier

Compress JSON by stripping all whitespace and indentation for smaller payloads.

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Conversion

2 tools

Conversion 100% Private

JSON to CSV Converter

Convert JSON arrays into tabular CSV files for Excel and Google Sheets.

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Conversion 100% Private

CSV to JSON Converter

Convert CSV spreadsheet data into structured JSON objects or arrays.

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Encoding

3 tools

Encoding 100% Private

Base64 Encoder & Decoder

Encode text and files to Base64 strings or decode Base64 back to readable text.

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Encoding 100% Private

URL Encoder & Decoder

Encode URL query parameters safely with percent-encoding or decode URL strings.

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Encoding 100% Private

HTML Entity Encoder & Decoder

Convert special characters into HTML entities (e.g. &, <, >) to prevent XSS.

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Cryptography

1 tools

Cryptography 100% Private

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes in real time.

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Web Security

1 tools

Web Security 100% Private

JWT Decoder

Decode and inspect JSON Web Token (JWT) headers, claims, and expiry dates.

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Testing

1 tools

Testing 100% Private

Regex Tester

Test regular expressions in real time with live match highlighting and flags.

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DevOps

1 tools

DevOps 100% Private

Cron Expression Generator

Build cron schedule expressions with human-readable descriptions.

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Design & CSS

1 tools

Design & CSS 100% Private

Color Converter (HEX, RGB, HSL, CMYK)

Convert colors between HEX, RGB, HSL, and CMYK formats with visual color preview.

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Web Analysis

1 tools

Web Analysis 100% Private

URL Parser & Breakdown

Parse and dissect URLs into protocol, hostname, port, pathname, search params, and hash.

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Frequently Asked Questions about Developer Tools

Is it safe to paste JWT tokens or code into ToolPilot?

Yes! ToolPilot runs all developer tools locally in your browser. No tokens, JSON payloads, or source code are ever transmitted to any server. However, we always recommend caution with sensitive production secrets.

Which hash algorithms are supported?

We support SHA-1, SHA-256, SHA-384, and SHA-512 via the native browser Web Crypto API, alongside an audited client-side MD5 implementation.