Developer Tools Tools | The Free Tools Directory

Password Generator

A random password generator to create strong and secure passwords. To ensure security, they are generated on the webpage without being sent over the internet.

4 options🛡️ Security

Excel to JSON Converter

Convert Excel spreadsheets to JSON with multi-sheet support and custom formatting options

2 options💻 Developer Tools

JSON Validator

Validate JSON with detailed error messages and tree visualization

2 options💻 Developer Tools

Image to PDF Converter

Convert photos to PDF on iPhone, Android, or desktop. Mobile-optimized tool for combining images into PDF documents.

2 options💻 Developer Tools

HTML Entity Encoder

Encode and decode HTML entities with XSS prevention analysis

2 options💻 Developer Tools

Base64 decode

2 options💻 Developer Tools

Base64 Encode

2 options💻 Developer Tools

Base64 to Image

2 options💻 Developer Tools

HTML Table Generator

2 options💻 Developer Tools

URL encode

2 options💻 Developer Tools

URL decode

2 options💻 Developer Tools

PX to EM Converter

Use our px to em converter to quickly switch between the four most popular CSS font-size units: px, em, pt, and percents.

2 options🔄 General Conversion

CIDR Calculator

The CIDR calculator will give you the IP range of any network block given in CIDR notation and convert an IP range to CIDR notation.

2 options🧮 Miscellaneous Calculators

Yes or No Generator

The Yes or No Generator is the ultimate decision tool for "Yes" or "No" questions. The calculator randomly generates "Yes" or "No" answers for you.

2 options🏠 Everyday Tools

String to binary converter

2 options🔢 Number Conversion

Case converter

2 options📝 Text & Encoding

Morse Code Translator

Find out how to write a message in Morse code and how to translate back to plain text with our handy Morse code translator.

2 options🧮 Miscellaneous Calculators

CSV to JSON Converter

Convert CSV files to JSON format instantly with browser-based processing

1 option💻 Developer Tools

YAML to JSON Converter

Convert YAML to JSON or JSON to YAML with full support for comments and anchors

1 option💻 Developer Tools

Unix Timestamp Converter

Convert between Unix timestamps, Windows FILETIME, LDAP, WebKit/Chrome, and Cocoa/Mac timestamps with batch support

1 option💻 Developer Tools

Windows FILETIME Converter

Convert Windows FILETIME, LDAP, and Active Directory timestamps to human-readable dates. Batch convert lastLogon, pwdLastSet, and accountExpires values.

1 option💻 Developer Tools

ASCII Art Generator

Convert text and images to ASCII art. Text-to-ASCII with 200+ FIGlet fonts, image-to-ASCII with color output, edge detection, and dithering. Plus shapes and a pre-made art library.

1 option💻 Developer Tools

QR Code Generator

Create QR codes for URLs, text, and contact information

1 option💻 Developer Tools

Color Picker & Converter

Pick colors and convert between HEX, RGB, HSL, and HSV formats

1 option💻 Developer Tools