Browse developer tools by category with support for multiple language interfaces and quick search.
Convert Unix timestamp to date online, switch between Epoch seconds and milliseconds
Free Unix timestamp to date converter online. Convert Unix timestamp to date, date to Unix timestamp, inspect current Epoch time, switch between seconds and milliseconds, and compare results across time zones with everything processed locally in your browser.
Quickly locate differences, supports side-by-side or inline view
Paste two pieces of text to generate highlighted diff, with options to ignore whitespace or case, and support copying diff results.
Convert seconds to minutes, hours to days, supports batch conversion and formatted input
Free online time unit conversion tool. Supports bidirectional conversion between milliseconds, seconds, minutes, hours, days, weeks, real-time conversion results, supports formatted input (such as 1h 30m 45s), batch conversion of multiple time values, save history records.
Convert JSON to PHP array online with [] or array() output and nested data support
Free JSON to PHP array converter online. Paste JSON and generate PHP array code with short [] or long array() syntax, nested objects, associative arrays, and Laravel or Symfony-ready examples. You can also turn PHP arrays back into JSON in the browser with no uploads.
Free online JSON to Python dictionary tool - instant conversion, supports bidirectional conversion
Free online JSON to Python dictionary converter. Supports bidirectional conversion between JSON and Python dict, correctly maps True/False/None, provides Django, Flask, and FastAPI framework code snippets. 100% browser-side processing, no data uploads.
Free online JSON to Java class tool - supports Jackson, Gson annotations and Lombok
Free online JSON to Java POJO class generator. Automatically generates Java class code, supporting Jackson @JsonProperty and Gson @SerializedName annotations, Lombok @Data, nested objects and arrays. Customize class name, package name, and getter/setter. 100% browser-side processing, no data uploads.
Free online JSON to C++ converter - Support nlohmann/json, RapidJSON, Boost.JSON
Free online JSON to C++ converter. Automatically generates C++ struct/class code, supporting nlohmann/json, RapidJSON, Boost.JSON and other libraries. Compatible with C++11/14/17/20 standards, supports custom naming styles, indentation, and namespaces. Provides Unreal Engine integration examples. 100% browser-side processing, no data uploads.
JSON and YAML format conversion, supports syntax highlighting and history tracking
Free online JSON YAML conversion tool. Supports bidirectional conversion between JSON and YAML, real-time syntax validation, code highlighting, suitable for configuration files, Kubernetes, Docker Compose and other scenarios.
Batch convert, history tracking, support nested JSON structures
Free online JSON to CSV conversion tool. Supports batch file conversion, custom delimiters, flattening nested JSON, and conversion history. 100% browser-side processing, no data uploads.
Supports multiple URL encoding formats, one-click conversion and save history
Supports URI component encoding, full URI encoding, form encoding and SQL escaping, can convert text in real-time and save history records.
Generate custom QR codes, recognize QR codes in images
Supports generating styled QR codes (colors, sizes, error correction rates) and can upload images or use camera to recognize QR code content.
Support Base64 encoding and decoding for text and files, can preview images
Support standard Base64 and URL-safe formats. Encode text or files, automatically recognize and preview image content, and save history records.