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HTTP & API Tools

Between full Postman sessions you still need quick answers: what does this status mean, how do these headers look, can I fire a webhook, what meta tags should this share preview use? This set covers request debugging, documentation helpers, and social/SEO tags without leaving the browser.

16 free tools · Browse all tools

All HTTP & API Tools

HTTP & API Tools

HTTP Request Tester

Send simple HTTP requests from your browser and inspect the response.

HTTP & API Tools

Query String & UTM Builder

Build query strings and full UTM campaign URLs from key/value pairs.

HTTP & API Tools

Meta Tag Generator

Generate SEO and social meta tags for title, description, and Open Graph.

HTTP & API Tools

HTTP Status Code Lookup

Look up common HTTP status codes and their meanings.

HTTP & API Tools

User-Agent Parser

Parse a User-Agent string into browser, OS, and device hints.

HTTP & API Tools

HTTP Headers Checker

Inspect CORS-visible HTTP response headers for a URL.

HTTP & API Tools

cURL to Code Converter

Convert cURL commands into fetch, Axios, or Python requests code.

HTTP & API Tools

Meta Tags Previewer

Preview Google-style snippets and social cards while editing meta tags.

HTTP & API Tools

API Response Mocker

Build local mock HTTP JSON responses with status codes and delay.

HTTP & API Tools

Webhook Tester

Send test webhook HTTP requests and inspect responses.

HTTP & API Tools

Robots.txt Generator

Generate a robots.txt file for crawl rules and sitemaps.

HTTP & API Tools

Sitemap Generator

Build an XML sitemap from a list of URLs or paths.

HTTP & API Tools

Open Graph Generator

Generate Open Graph meta tags for social sharing.

HTTP & API Tools

Twitter Card Generator

Generate Twitter Card meta tags for link previews.

HTTP & API Tools

Canonical Tag Generator

Create a canonical link tag for duplicate URL control.

HTTP & API Tools

JSON-LD Generator

Generate JSON-LD structured data script tags.

Frequently asked questions

Between full Postman sessions you still need quick answers: what does this status mean, how do these headers look, can I fire a webhook, what meta tags should this share preview use? This set covers request debugging, documentation helpers, and social/SEO tags without leaving the browser.

Yes. Every tool in HTTP & API Tools is free to use with no account required.

No. Tools run locally in your browser so inputs stay on your device.

16 tools are available in HTTP & API Tools, including Request Tester, UTM Builder, Meta Tags.

Yes. Pages are responsive. Desktop browsers are usually more comfortable for large payloads.

Popular tools

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly in your browser.

Generator Tools

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words for mockups.

URL Encoder / Decoder

Encode and decode URL components with real-time conversion.

Crypto & Security Tools

UUID Generator

Generate RFC-compliant UUID v4 identifiers for apps and databases.

Recently added

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text.

Crypto & Security Tools

Hash Generator

Generate MD5, SHA-1, and SHA-256 hashes from any text input.

Word Counter

Count words, characters, sentences, paragraphs, and reading time instantly.

Case Converter

Convert text to UPPER, lower, Title Case, camelCase, snake_case, and more.