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JSON Tools
Format & Convert
Encoding & Crypto
Text & Numbers
Network
Web Ops
- Security & API
- Runtime & Automation
- Site Quality & Discovery
- Assets & Utilities
More Tools
- Calculators
- Interest Calculator
- Subnet Mask Calculator
- Scientific Calculator
- Utilities
- Online Drawing Board
- Online Clock
- World Time
- World Capitals
- World Currencies
- Country Codes & Time Zones
- World Holidays
- Special Characters
- Today in History
- Reference
- Common User-Agent
- Content-Type Reference
- HTTP Request Methods
- HTTP Header Reference
- HTTP Status Codes
- ASCII Reference
- HTML Character Escapes
- Common Ports
- Bootstrap Icons
- Android Manifest Permissions
- Common Linux Commands

.gitignore Generator
Git Release Notes
ENV Validator
DevOps Config Check

.gitignore Generator & Pattern Tester LOCAL ONLY

Combine practical project and editor presets, review common .gitignore mistakes, and test representative repository paths directly in your browser.

Everything in this tool is processed in this browser.

Preset groupsSelect only the environments your repository actually uses.

Node.jsPythonPHP / ComposerJava / GradleGoRustmacOSWindowsVS CodeJetBrainsEnvironment secrets

Representative pathsOne repository-relative path per line.

Generated .gitignorePatterns are deduplicated locally.

Pattern report

Run the tool to see local output here.

Recent tools:

KivTools Navigator

JSON Tools

JSON Formatter
JSON → TypeScript, Zod & Pydantic
Mock Data Generator
Data Lab: CSV / JSON / Parquet SQL
Data Recipe Studio
JSON Diff & Patch
JSONPath Tester
JSON Formatter (Vertical)
JSON Formatter (Side-by-side)
JSON Minify & Escape
JSON to C# Class
JSON to Java Class
JSON to Go Struct
SQL to Java Class
JSON ↔ XML
CSV / Excel to JSON
JSON to CSV / Excel
JSON ↔ Query Parameters
JSON to YAML

Format & Convert

Encoding & Crypto

MD5 Hash Generator
URL Hex Encode
Base64 Encode / Decode
Escape Encode / Decode
Symmetric Encrypt / Decrypt
AES Encrypt / Decrypt
DES Encrypt / Decrypt
RC4 Encrypt / Decrypt
Rabbit Encrypt / Decrypt
TripleDES Encrypt / Decrypt
SHA / SHA-256 Hash
Hash Algorithms
Morse Code Encode / Decode
Password Generator
UUID Generator
GUID Generator
htpasswd Generator
Barcode Generator
QR & Barcode Decoder
IP / Integer Conversion
Image to Base64
UTF-8 to GBK
Unicode / ASCII Converter
ASCII Encode / Decode
URL Encode / Decode
Native / Unicode Converter
Keyboard Key Codes
Android Key Codes
Keyboard Tester

API & Security

OpenAPI Explorer
API Collection Converter
HTTP Request Builder
GraphQL Explorer
OpenAPI Validator
OpenAPI Diff & Breaking Changes
OpenAPI Docs Studio
API Response Validator
JSON Schema Validator
JWT Inspector & Generator
JWT / JWK Pro Verifier
OIDC Config & PKCE
PEM / Certificate / JWK Inspector
Webhook Signature Tester
CSP & Security Headers
Secret & PII Scanner
API Request Security Check
cURL ⇄ Fetch ⇄ Axios
HTTP Header Reference
JSON Formatter

Text & Numbers

HTML Editor
Content Extractor
Text Replace
Text Diff
Word Count
Vertical Text
Text Flip
Duplicate Content Check
Text Effects
String Minifier
Camel Case ↔ Snake Case
Full-width / Half-width Converter
Letter Case Converter
Random Number Generator
Unix Timestamp Converter
Base Converter
RGB Color Converter

Network

IP Geolocation Lookup
WebSocket Tester
Browser Information
Public DNS
US DNS

Web Ops

.htaccess to Nginx
Cron Expression Parser
ENV Parser & Validator
Log Parser & Analyzer
Docker Compose Validator
Dockerfile / CI / Kubernetes Check
HAR File Analyzer
Technical SEO HTML Inspector
Accessibility Auditor
Image Color Extractor
Desktop Shortcut Generator
rem ↔ px Converter
ICO Icon Generator
Meta Tag Generator
Timed URL Refresh
Color Palette
Gzip Compression Check
Broken Link Check
WHOIS Lookup
Meta Tag Analyzer
Keyword Density Check
HTTP Status Lookup

Calculators

Interest Calculator
Subnet Mask Calculator
Scientific Calculator
Area Converter
Heat Converter
Volume Converter
Pressure Converter
Power Converter
Length Converter
Temperature Converter
Time Converter
Speed Converter
Angle Converter
Data Size Converter
Density Converter
Force Converter

Utilities

Online Drawing Board
Online Clock
World Time
World Capitals
World Currencies
Country Codes & Time Zones
World Holidays
Special Characters
Today in History

Reference

Common User-Agent
Content-Type Reference
HTTP Request Methods
HTTP Header Reference
HTTP Status Codes
ASCII Reference
HTML Character Escapes
Common Ports
Bootstrap Icons
Android Manifest Permissions
Common Linux Commands

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