Validate OpenAPI/Swagger spec syntax. Check for required fields, missing paths, and structural issues in your API specification.
Validate GraphQL schema syntax and structure. Detect missing root types, unknown type references, and common schema issues.
Generate mock API responses from OpenAPI spec fragments. Create realistic sample data for API development and testing.
Format and beautify JSON and XML API responses with proper indentation and syntax highlighting.
Analyzes your writing with real-time word count, sentence count, syllable count, paragraphs, and advanced readability metrics — Flesch-Kincaid Reading Ease, Grade Level, estimated speaking time, and keyword density. Essential for writers, students, and SEO professionals optimizing content for readability.
Determines the exact unit volume or revenue required to cover fixed and variable costs, with a built-in sensitivity slider for price changes. Essential for startup pricing strategy, product launch planning, and manufacturing cost analysis where knowing your break-even point is critical before committing to production.
OpenAPI Validator lets you validate OpenAPI/Swagger spec syntax. Check for required fields, missing paths, and structural issues in your API specification.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Validate OpenAPI/Swagger spec syntax. Check for required fields, missing paths, and structural issues in your API specification. It's ideal for developers, designers, and anyone who needs to validate openapi/swagger spec syntax without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, OpenAPI Validator 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.