Developer Tools
Free online developer tools including JSON formatter, Base64 encoder, and code utilities. No installation required, runs in your browser.
JSON Formatter
Format, validate, beautify, and minify JSON data with syntax highlighting. Free browser-based tool with instant error detection, no registration.
JSON Diff
Compare two JSON objects side by side and highlight differences. Detect added, removed, and changed values with export to JSON Patch (RFC 6902).
JSON Schema Validator
Validate JSON data against a JSON Schema (Draft 7) with detailed error reporting. Free browser-based tool with sample schemas and path-level diagnostics.
JSON Converter
Convert between JSON, YAML, CSV, and XML formats instantly. Free browser-based tool with bidirectional conversion, no registration required.
JSONPath Query
Query and extract data from JSON using JSONPath expressions. Supports recursive descent, wildcards, filters, and array slicing. Free online tool.
Base64 Encoder/Decoder
Encode and decode Base64 strings instantly with this free online tool. Real-time conversion in your browser, no registration or data sharing.
Java Decompiler
Decompile Java .class files to readable source code directly in your browser. View class structure, fields, methods, and bytecode.
Why Use Developer Tools?
A collection of essential developer utilities designed to streamline your coding workflow. Format and validate JSON data, encode and decode Base64 strings, and debug data structures — all without leaving your browser. These tools support daily development tasks like API testing, data transformation, and debugging, saving you time and eliminating the need for installing desktop applications.
Frequently Asked Questions
Are the developer tools free?
Yes, all developer tools are completely free. No sign-up, API key, or installation is required.
Is my code processed on the server?
No. All processing runs locally in your browser. Sensitive data such as API keys, tokens, and credentials you paste into the tools never leave your machine.
What does the JSON Formatter do?
The JSON Formatter validates, formats, and syntax-highlights JSON data. It detects syntax errors and shows the line and character position of the problem, making it easy to debug malformed JSON.
What is Base64 encoding used for?
Base64 encodes binary data as ASCII text, which is commonly required for HTTP Authorization headers, data URIs, email attachments (MIME), and embedding binary content inside JSON payloads.
Can I use these tools for production debugging?
Yes. Because all processing is local, there is no risk of transmitting production data to a third-party server. These tools are suitable for debugging live API responses and data structures.