Convert OpenAPI specs to Postman collection JSON format. Import the result directly into Postman for API testing.
Convert Postman collections to OpenAPI 3.0 specs. Migrate your API documentation from Postman to OpenAPI format.
Format converters (INI to JSON, JSON to TOML, JSON to Toon, MessagePack/CBOR inspector), data tools (Excel data cleaner, Excel sheet merger, dataset analyzer, data anonymizer), code converters (code to cURL, cURL to code, JSON-RPC builder), and analyzers (HAR file analyzer, log file analyzer, package.json validator, MIME type finder).
TOML tools (JSON to TOML, TOML to JSON, TOML validator), YAML tools (YAML to JSON, JSON to YAML, JSON to Toon, YAML validator), XML & SQL tools (XML to JSON/YAML/CSV/Toon, XML validator, SQL INSERT to JSON/CSV), and TSV tools (TSV to CSV).
Convert JPEG photos into GIF format for legacy applications and platforms with limited format support.
Convert TIFF images into universally compatible JPEG format for sharing on the web or via email.
OpenAPI to Postman lets you convert OpenAPI specs to Postman collection JSON format. Import the result directly into Postman for API testing.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Convert OpenAPI specs to Postman collection JSON format. Import the result directly into Postman for API testing. It's ideal for developers, designers, and anyone who needs to convert openapi specs to postman collection json format without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Common file formats are supported for upload-based tools.
Yes. After the initial page load, OpenAPI to Postman runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.