Developer Tools — Free Online Developer Utilities
Developers constantly need to encode, decode, format, and convert data during debugging, testing, and integration work. These developer tools run entirely in the browser and handle common tasks without installing CLI utilities or spinning up a REPL. Format and validate JSON with syntax highlighting, tree view, and JSONPath navigation — useful when inspecting API responses or configuration files. Encode and decode Base64 in Standard, URL-safe, and MIME variants for embedding data in URLs, emails, or JWT tokens. Generate RFC 9562 compliant UUIDs (v1, v4, v5, v7) with bulk export in JSON, JavaScript, Python, and SQL formats. Convert Unix timestamps to human-readable dates across multiple timezones with auto-detection of seconds, milliseconds, and nanosecond precision. Convert between decimal, binary, octal, and hexadecimal for low-level debugging and bitwise operations.
Text to Binary
Convert any text to binary (ASCII) and back
Unix Timestamp Converter
Convert Unix timestamps to dates and back with multi-timezone support
UUID Generator
Generate UUID v1, v4, v5, v7 with bulk export and inspection
Base64 Encoder
Encode and decode Base64 with Standard, URL-safe, and MIME variants
Decimal to Binary Converter
Convert decimal numbers to binary, octal, and hex instantly
Hex to Decimal Converter
Convert hexadecimal values to decimal instantly
JSON Formatter
Format, validate, minify, and view JSON as a tree instantly
When to Use Developer Tools
Use developer tools during coding, debugging, and data integration workflows. Format messy JSON from API responses to find the field you need. Encode binary data to Base64 before embedding it in a JSON payload or data URI. Generate UUIDs for database primary keys, correlation IDs, or test fixtures. Convert Unix timestamps when reading server logs or debugging time-related bugs. Translate between number bases when working with bitfields, network masks, or memory addresses.
Frequently Asked Questions
Is my code or data safe in these developer tools?
Yes. All processing happens in your browser using JavaScript. No data is sent to any server, stored in any database, or logged anywhere. You can verify this by checking the Network tab in DevTools — there are zero outbound requests when using any tool.
Which UUID versions are supported?
The UUID Generator supports v1 (time-based), v4 (random), v5 (namespace SHA-1), and v7 (Unix epoch time-ordered). All versions comply with RFC 9562. You can generate up to 500 UUIDs at once and export them in JSON, JavaScript, Python, or SQL format.
Can the JSON Formatter fix invalid JSON?
Yes. The JSON Formatter includes smart repair that automatically fixes common issues like trailing commas, unquoted keys, single-quoted strings, and missing closing brackets. It attempts to parse the repaired output and highlights exactly where the original error was.