Developer Online Tools

A collection of small tools for development and debugging. Use them to handle API responses, encoding conversion, time fields, configuration files, binary snippets, and documentation structure. The tools try to run locally in the browser, so input is not actively uploaded to the server.

Common tools

• Timestamp converter: Convert Unix timestamps, millisecond timestamps, local time, and UTC time.
• URL encode and decode: Handle query parameters, multilingual links, and special characters.
• JSON formatter: Format, minify, validate JSON, and convert between JSON and YAML.
• JSON diff: Compare structural and value differences between two JSON documents.
• Base64 converter: Encode, decode, and process Base64URL text.
• File to Base64: Convert local files to Base64 or Data URL.

Good for

• API debugging, log inspection, and configuration checks
• Text encoding, URL parameter handling, and data snippet validation
• README, knowledge base, and project documentation cleanup