Developer Tools - Professional Online Tools for Modern Development

224 tools found

Network

IP Address Finder

Find your public IP (IPv4/IPv6) with geo & ISP

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Data

CSV Cleaner & Normalizer

Clean CSVs, normalize headers, dedupe, and fix encodings

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Text

Markdown Previewer

Live Markdown editor with preview, code, math, and diagrams

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Network

API Rate Limiting Calculator

Calculate optimal rate limiting configurations for your APIs

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Data

XML ⇄ JSON Converter

Convert XML and JSON with attributes and CDATA options

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Data

CSV ⇄ JSON Converter

Convert CSV and JSON with header handling and custom delimiters

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Data

Unit Converter

Convert units across data, time, length, mass, temperature

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Data

JSON Formatter

Format, validate and beautify JSON data

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Time

Cron Expression Builder

Build, validate, and preview cron expressions across dialects

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Data

YAML ⇄ JSON Converter

High-fidelity YAML↔JSON conversion with validation and linting

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Data

YAML Formatter & Validator

Professional YAML formatting, validation, and schema checking with real-time error reporting

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Text

Regex Tester

Test, debug, and compare regex patterns with live insights

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Data

JSON Minify

Minify JSON and remove whitespace

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Data

JSON Tree

Explore JSON with interactive tree view

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Data

JSON Query

Query JSON with simple JSONPath-like syntax

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Data

JSON Schema Validator

Validate JSON against a JSON Schema

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Data

JSON Diff

Compare two JSON documents and highlight differences

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Security

Password Generator

Generate secure passwords with customizable options

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Data

Base64 Encoder/Decoder

Encode and decode Base64 strings

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Security

Hash Generator

Generate various hash types (MD5, SHA1, SHA256)

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Data

UUID / GUID Generator

Generate and validate RFC 4122 UUIDs (v1, v4, v5) with formatting options

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Security

JWT Decoder & Verifier

Decode, verify, and decrypt JWTs (JWS/JWE) with JWKS

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Data

XML Formatter

Format and validate XML documents

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Data

URL Encoder/Decoder

Encode and decode URLs

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Productivity

Snake Game

Classic snake game for fun

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Productivity

Sumino

Make-ten math puzzle game with falling number blocks

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Time

Timestamp Converter

Convert between timestamps and readable dates

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Data

QR Code Generator

Generate QR codes from text or URLs

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Design

Color Picker

Pick colors and get hex, RGB, and HSL values

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Design

CSS Gradient Generator

Create beautiful CSS gradients with live preview and code generation

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