Developer Tools by PulpMiner
A collection of free, fast, and private developer utilities. No signup required — everything runs in your browser.
Website to JSON
Extract structured JSON data from any webpage URL. Powered by AI — just enter a URL and get clean, organized data.
JSON Formatter & Validator
Beautify, minify, and validate JSON data. Catch syntax errors instantly with helpful messages.
JSON to CSV Converter
Convert JSON arrays of objects into downloadable CSV files. Fast and private — runs entirely in your browser.
URL Parser & Decoder
Parse URLs into components, encode and decode URL strings. Inspect query parameters at a glance.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Fast and private — runs in your browser.
Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.
JWT Decoder
Decode JSON Web Tokens to inspect header, payload, and signature. Check expiration and issued-at timestamps.
Regex Tester
Test regular expression patterns with real-time match highlighting and capture group inspection.
Hash Generator
Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes from text. Uses the Web Crypto API in your browser.
CSV to JSON Converter
Convert CSV data into JSON arrays of objects. Supports custom delimiters including comma, tab, and semicolon.
XML to JSON Converter
Convert XML data into clean, readable JSON. Handles attributes, nested elements, and text content.
HTML Table Extractor
Extract tables from HTML and export as JSON or CSV. Paste any HTML containing tables to get structured data.
API Response Tester
Send HTTP requests (GET, POST, PUT, DELETE) and inspect responses. View status codes, headers, and response bodies.
Webhook Payload Formatter
Format and inspect webhook JSON payloads. Detects event types, timestamps, and nested structures automatically.
HTTP Status Code Reference
Complete reference for all HTTP status codes with descriptions and categories. Search by code, name, or description.
Text Diff / Compare
Compare two blocks of text side by side. See additions, deletions, and unchanged lines highlighted with line numbers.
JSONPath Tester
Test JSONPath expressions against JSON data and see matched results instantly. Includes example expressions.
CSS Selector Tester
Test CSS selectors against HTML to find matching elements. Great for debugging web scraping selectors.
Query String Parser
Parse URL query strings into key-value pairs or build query strings from parameters.
Cron Expression Generator
Build cron expressions with presets or type your own. Get human-readable explanations and upcoming run times.
User Agent Parser
Parse user agent strings to identify browser, operating system, device type, and rendering engine.
IP Address Lookup
Find your public IP address or look up any IP to get geolocation, organization, and timezone information.
Sitemap Parser
Extract URLs from XML sitemaps. Paste sitemap XML and get a clean, downloadable list of all URLs.
Markdown to HTML
Convert Markdown to clean HTML with live preview. Supports headings, bold, italic, links, lists, and code blocks.
Mock API Generator
Generate realistic mock JSON API responses for testing. Define your schema and get instant mock data.
XPath Tester
Test XPath expressions against HTML or XML. Find matching elements instantly — perfect for web scraping and data extraction.
YAML ↔ JSON Converter
Convert YAML to JSON or JSON to YAML. Handles nested objects, arrays, comments, and multiline strings.
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, UPPER, lower, Title Case, and more.
Slug Generator
Generate clean, URL-friendly slugs from any text. Handles accents, special characters, and custom separators.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities or decode entities back to text. Supports named and numeric entities.
Duplicate Line Remover
Remove duplicate lines from text. Options for case sensitivity, trimming whitespace, and sorting output.
Word & Character Counter
Count words, characters, sentences, paragraphs, and more. Includes reading time, speaking time, and keyword density.
JSON Schema Validator
Validate JSON data against a JSON Schema. Supports draft-07 keywords including types, patterns, refs, and combinators.
JSON Diff / Compare
Compare two JSON objects and see additions, removals, and changes highlighted. Deep recursive comparison with path tracking.
HTML to Markdown
Convert HTML to clean Markdown. Handles headings, links, images, lists, tables, code blocks, and more.
Lorem Ipsum Generator
Generate placeholder lorem ipsum text. Choose paragraphs, sentences, or words with customizable count.
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats. Includes live preview and individual channel controls.
SQL Formatter & Validator
Beautify or minify SQL queries. Uppercases keywords, indents subqueries, and validates syntax.
CSS Minifier / Beautifier
Beautify or minify CSS code. Proper indentation, one property per line, or compressed single-line output.
JavaScript Minifier / Beautifier
Beautify or minify JavaScript code. Handles indentation, comments, strings, and template literals.
Password Generator
Generate secure random passwords with customizable length, character sets, and strength indicator. Uses crypto API.
QR Code Generator
Generate QR codes from any text or URL. Customize size and colors. Download as PNG — all client-side.
Base64 Image Encoder / Decoder
Convert images to Base64 strings or decode Base64 back to images. Supports data URIs, CSS, and HTML output.
API Response to TypeScript
Generate TypeScript interfaces or types from JSON API responses. Handles nested objects, arrays, and nulls.
Webhook Signature Generator
Generate or verify HMAC webhook signatures. Supports SHA-256, SHA-384, and SHA-512 with hex or base64 encoding.
Robots.txt Generator & Analyzer
Generate robots.txt files with user-agent rules or analyze existing ones. Test URL paths against bot rules.
Meta Tags Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards. Includes Google search preview.
HMAC Generator
Generate HMAC signatures using SHA-256, SHA-384, or SHA-512. Uses the Web Crypto API for secure hashing.
JSON-LD Structured Data Generator
Generate JSON-LD structured data for SEO. Supports Article, Product, FAQ, Organization, and more schema types.
Need to extract data from websites?
PulpMiner turns any webpage into a structured JSON API. No scraping code needed — just point, click, and get clean data.
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