Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands.
Build and test SOAP API envelopes with WSDL URL, method name, and XML parameters. Generate complete SOAP request envelopes.
Generate common HTTP headers for JSON, REST, and GraphQL APIs with correct Content-Type and authorization patterns.
API tester with method/header/body support, webhook sender with Slack/Discord payload templates, GraphQL query executor, and mock data generator.
Add professional headers and footers to every page of your PDF. Supports text, page numbers ({{page}}/{{total}}), dates, and custom alignment. Perfect for reports and official documents.
Expression evaluator with keypad and history, ETA calculator with distance and speed, and a stopwatch/chronometer with lap recording.
API Request Builder lets you build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. It's ideal for developers, designers, and anyone who needs to build http requests with custom method, url, headers, and body 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, API Request Builder 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.