Free Online Developer Tools
Format JSON, generate secure passwords and QR codes, inspect text and transform letter case with lightweight browser utilities for daily development work.
Choose a Developer Tool
Use a focused utility without creating an account or installing another application.
JSON Formatter & Validator
Beautify, minify and validate JSON while identifying syntax errors quickly.
Format JSON →Password Generator
Create strong randomized passwords with configurable length, numbers and symbols.
Generate a password →QR Code Generator
Create downloadable QR codes for URLs, documentation, text and test data.
Create a QR code →Word & Character Counter
Measure words, characters, sentences, paragraphs and estimated reading time.
Count text →Case Converter
Convert text to uppercase, lowercase, title case, sentence case and more.
Convert text case →Practical utilities for common development tasks
Small formatting and validation tasks interrupt development more often than they should. This collection puts frequently needed utilities in one fast toolbox: clean API responses, validate configuration data, generate test credentials, create QR codes and normalize text without opening a full editor.
Built for quick browser workflows
Paste the data you need to process, use the relevant control and copy or download the result. These tools are designed for fast one-off tasks, learning, debugging and content preparation.
When to use each tool
- Use JSON Formatter when an API response or configuration file is difficult to read or fails to parse.
- Use Password Generator for random test credentials or new account passwords.
- Use QR Code Generator to turn a public URL or short text value into a scannable code.
- Use Word Counter to check documentation, UI copy and metadata length.
- Use Case Converter to normalize headings, labels or pasted datasets.
Frequently asked questions
Can the JSON tool repair invalid JSON automatically?
It identifies syntax problems and formats valid JSON. Review suggested corrections carefully because only you know the intended data structure.
Are generated passwords stored?
The generator is designed to create passwords in the browser. Avoid generating or copying sensitive credentials on shared devices.
Do these tools require an account?
No. ITFixLab developer utilities can be opened and used without signup.