Fast, Practical Tools for Real-World Problems
Simple, fast tools built for engineers, creators, and everyday problem-solvers. No signup. No tracking—your data stays in your browser
Curated Popular Tools
Hand-picked utilities engineered for maximum daily productivity
Online Screen Ruler
Measure pixels, inches, millimeters, and centimeters on your screen with DPI calibration, rotation, and multi-unit guides.
JSON Formatter & Validator
Format, validate, minify, inspect, and fix JSON data instantly with syntax highlighting and tree view.
Hash & Checksum Generator
Calculate cryptographic SHA-256, SHA-512, SHA-384, SHA-1, MD5, and HMAC hashes client-side with file drop support.
Base64 Encoder & Decoder
Encode and decode text and binary files to Base64 format client-side with UTF-8 safety and instant download.
Cron Expression Generator & Explainer
Visual interactive cron schedule builder, human-readable explainer, and next execution timestamp calculator.
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.
Browse by Category
Structured collections designed for focused engineering workflows
Developer Tools
Code validators, formatters, schema generators, and utilities built for engineers.
Text & Formatting
Case transformations, string analyzers, text manipulation, and cleaning tools.
Data & Conversion
Encoders, decoders, data format transformers, and structured data analyzers.
File Utilities
SVG optimizers, media inspection, and in-browser safe file processors.
Security & Privacy
Web Crypto hashers, password entropy analyzers, and local-only security tools.
Productivity & Measurement
Interactive screen rulers, cron builders, and workflow speed multipliers.
Learning & Calculators
Interactive concept visualizers, algorithms, and tech learning companions.
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