Swiss Army Dev

JSON Formatter

Format, validate, and minify JSON

echo '{"a":1}' | curl -X POST -d @- /json

JSON Schema

Generate schema from JSON sample

echo '{"a":1}' | curl -X POST -d @- /jsonschema

SQL Formatter

Prettify SQL with dialect support

echo "SELECT * FROM users WHERE id=1" | curl -d @- /sql

RegEx Tester

Live regex with match highlighting

curl -d 'pattern=\d%2B&flags=g&test=abc123' /regex

Markdown Preview

Render Markdown as HTML

echo "# Hello" | curl -X POST -d @- /md

HTML Preview

Preview HTML in sandboxed iframe

echo "<h1>Hello</h1>" | curl -X POST -d @- /html

Encoder / Decoder

Base64, URL, HTML, hex encode/decode

echo -n "hello" | curl -d @- /encode?type=base64-encode

JSON ↔ YAML

Convert between JSON and YAML

echo '{"a":1}' | curl -d @- /convert?direction=json-to-yaml

CSV ↔ JSON

Convert between CSV and JSON

printf "name,age\nAlice,30" | curl -d @- /csv?direction=csv-to-json

TOML Converter

TOML ↔ JSON ↔ YAML

printf '[pkg]\nname="app"' | curl -d @- /toml?direction=toml-to-json

Case Converter

camelCase, snake_case, kebab-case

curl /case?text=helloWorld

Base Converter

Decimal, hex, binary, octal

curl /base?value=255&from=decimal

Color Converter

Hex/RGB/HSL + WCAG contrast

curl /color?color=%236366f1

ID Generator

UUID v4, v7, ULID, nanoid

curl /uuid?type=v7&count=5

Password Generator

Cryptographically secure passwords

curl /password?length=32

Lorem Ipsum

Placeholder text generator

curl "/lorem?count=3&unit=paragraphs"

QR Code

Generate QR codes from text/URLs

curl /qr?data=https://example.com

Placeholder Image

Generate SVG placeholder images

curl /placeholder?w=800&h=400&text=Logo

Encrypted Paste

Zero-knowledge paste bin

Browser only — encryption happens client-side

Hash Generator

SHA-1, SHA-256, SHA-512

echo -n "hello" | curl -X POST -d @- /hash

JWT Decoder

Decode tokens, check expiry

echo "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxIn0.c2ln" | curl -d @- /jwt

String Escaper

Escape special chars for code contexts

curl -d 'input=foo.*bar&context=regex' /escape

Chmod Calculator

Octal ↔ symbolic permissions

curl /chmod?mode=755

Text Diff

Compare two texts line-by-line

curl -H 'Content-Type: application/json' -d '{"old":"a","new":"b"}' /diff

Word Counter

Characters, words, lines, bytes

echo "Hello world" | curl -X POST -d @- /count

URL Parser

Break URLs into components

curl "/url?url=https://example.com/path?q=1"

AI Content Detector

Heuristic AI text analysis

echo "Your text..." | curl -X POST -d @- /ai-detect

IP Info

Your IP, geo, and headers

curl /ip

DNS Lookup

A, AAAA, MX, CNAME, TXT, NS records

curl /dns?domain=example.com&type=A

Whois Lookup

Domain registrar, dates, nameservers

curl /whois?domain=example.com

SSL Checker

Certificate validity and expiry dates

curl /ssl?domain=example.com

HTTP Headers

Inspect response headers + security

curl /headers?url=https://example.com

HTTP Status Codes

Searchable status code reference

curl /http?code=404

CIDR Calculator

Subnet mask, range, host count

curl /cidr?cidr=192.168.1.0/24

User-Agent Parser

Browser, OS, device, bot detection

curl /ua

Timestamp

Unix ↔ human-readable dates

curl /timestamp?ts=1700000000

Cron Explainer

Standard + Spring Boot cron with next runs

curl "/cron?expr=*/5+*+*+*+*"