Convert Postman collections to OpenAPI 3.0 specs. Migrate your API documentation from Postman to OpenAPI format.
Convert OpenAPI specs to Postman collection JSON format. Import the result directly into Postman for API testing.
Generate Markdown API documentation from OpenAPI specs. Create clean, readable docs with endpoints, parameters, and response examples.
Generate clean API documentation from endpoint descriptions. Includes parameters, response examples, and curl command samples.
Convert between MKV, MP4, MOV, WebM, and AVI video formats. Pick any input and output format from the dropdown — your files never leave your device.
Convert between MP3, WAV, FLAC, OGG, M4A, and AAC audio formats. Pick any input and output format — your files never leave your device.
Postman to OpenAPI Converter lets you convert Postman collections to OpenAPI 3.0 specs. Migrate your API documentation from Postman to OpenAPI format.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Convert Postman collections to OpenAPI 3.0 specs. Migrate your API documentation from Postman to OpenAPI format. It's ideal for developers, designers, and anyone who needs to convert postman collections to openapi 3 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, Postman to OpenAPI Converter 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.