ToolPipe / Free API Tools

50+ Free API Tools for Developers

Every tool works with a single curl command. No signup, no API key, no rate limits on basic usage. Just call the endpoint.

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Data Transformation

JSON Formatter / Validator

POSTFree

Format, validate, and prettify JSON. Returns formatted output with syntax validation.

curl -X POST https://toolpipe.dev/json/format \
  -H "Content-Type: application/json" \
  -d '{"json_string": "{\"name\":\"John\",\"age\":30}"}'

Base64 Encode / Decode

POSTFree

Encode or decode Base64 strings.

curl -X POST https://toolpipe.dev/base64/encode \
  -d '{"text": "Hello World"}'

JSON to YAML / YAML to JSON

POSTFree

Convert between JSON and YAML formats.

curl -X POST https://toolpipe.dev/convert/json-to-yaml \
  -H "Content-Type: application/json" \
  -d '{"json_string": "{\"name\": \"test\"}"}'

CSV to JSON

POSTFree

Convert CSV data to JSON array.

curl -X POST https://toolpipe.dev/convert/csv-to-json \
  -d '{"csv_string": "name,age\nJohn,30\nJane,25"}'

XML to JSON / JSON to XML

POSTFree

Convert between XML and JSON.

curl -X POST https://toolpipe.dev/convert/xml-to-json \
  -d '{"xml_string": "<root><name>test</name></root>"}'

Security & Cryptography

Hash Generator

POSTFree

Generate MD5, SHA1, SHA256, SHA512 hashes.

curl -X POST https://toolpipe.dev/hash/generate \
  -d '{"text": "hello world", "algorithm": "sha256"}'

UUID Generator

GETFree

Generate UUID v4 strings.

curl https://toolpipe.dev/uuid/generate

Password Generator

GETFree

Generate secure random passwords.

curl "https://toolpipe.dev/password/generate?length=32&symbols=true"

Code Tools

SQL Formatter

POSTFree

Format and prettify SQL queries with proper indentation.

curl -X POST https://toolpipe.dev/sql/format \
  -d '{"sql": "SELECT * FROM users WHERE id=1 ORDER BY name"}'

Regex Tester

POSTFree

Test regex patterns against strings with match highlighting.

curl -X POST https://toolpipe.dev/regex/test \
  -d '{"pattern": "\\d+", "test_string": "abc 123 def 456"}'

JWT Decoder

POSTFree

Decode JWT tokens without verification. Shows header, payload, expiration.

curl -X POST https://toolpipe.dev/jwt/decode \
  -d '{"token": "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U"}'

Web Tools

Web Scraper

POSTFree

Extract text, links, and metadata from any webpage.

curl -X POST https://toolpipe.dev/scrape/extract \
  -d '{"url": "https://example.com"}'

DNS Lookup

GETFree

Query DNS records for any domain.

curl "https://toolpipe.dev/dns/lookup?domain=example.com&type=A"

QR Code Generator

GETFree

Generate QR code images from any text or URL.

curl "https://toolpipe.dev/qr/generate?text=https://example.com&size=300" -o qr.png

File Tools

PDF Merge

POSTFree

Merge multiple PDF files into one.

curl -X POST https://toolpipe.dev/pdf/merge \
  -F "[email protected]" -F "[email protected]" -o merged.pdf

Markdown to HTML

POSTFree

Convert Markdown to HTML.

curl -X POST https://toolpipe.dev/convert/markdown-to-html \
  -d '{"markdown": "# Hello\n\nThis is **bold**."}'

And 30+ More...

CSS minifier, JS minifier, image resize, color converter, WHOIS lookup, SSL checker, HTTP headers, IP geolocation, cron parser, .env parser, text stats, lorem ipsum generator, timestamp converter, URL shortener, diff checker, HTML stripper, number formatter, and more.

Full interactive documentation: /docs

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