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Tools Directory

Fast, focused, browser-based utilities that run 100% locally. Zero server latency, zero data tracking.

Productivity & Measurement 100% Client-Side

Online Screen Ruler

Measure pixels, inches, millimeters, and centimeters on your screen with DPI calibration, rotation, and multi-unit guides.

#ruler#measure#screen
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Developer Tools 100% Client-Side

JSON Formatter & Validator

Format, validate, minify, inspect, and fix JSON data instantly with syntax highlighting and tree view.

#json#formatter#validator
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Security & Privacy 100% Client-Side

Hash & Checksum Generator

Calculate cryptographic SHA-256, SHA-512, SHA-384, SHA-1, MD5, and HMAC hashes client-side with file drop support.

#hash#crypto#sha256
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Data & Conversion 100% Client-Side

Base64 Encoder & Decoder

Encode and decode text and binary files to Base64 format client-side with UTF-8 safety and instant download.

#base64#encode#decode
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Text & Formatting 100% Client-Side

String Case Converter

Convert text to camelCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and Sentence case with character metrics.

#case#converter#camelcase
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Developer Tools 100% Client-Side

Cron Expression Generator & Explainer

Visual interactive cron schedule builder, human-readable explainer, and next execution timestamp calculator.

#cron#crontab#schedule
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Security & Privacy 100% Client-Side

Password & Passphrase Generator

Generate cryptographically secure passwords and passphrases with NIST entropy score calculation and custom charsets.

#password#passphrase#entropy
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Developer Tools 100% Client-Side

API Test Data & Negative Scenario Generator

Generate realistic valid, invalid, boundary and edge-case API payloads instantly in your browser. Supports JSON Schema, OpenAPI, and raw JSON.

#api#test data#json schema
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