Zero-install cryptographic, format transformation, calculation, and engineering utilities executing in client memory. Sub-millisecond execution with local browser-side data processing.
All payloads execute locally in browser memory
Web Crypto, WASM, Web Workers & Canvas
Tested against official specification suites
Zero install, offline-ready progressive web app
Explore randomized, in-browser utilities across all 12 domains. Sub-millisecond execution with zero server data egress.
Format, validate, repair, and minify JSON data instantly.
Decode, verify claims, inspect headers, and check token expiry.
Live statistics: words, characters, sentences, paragraphs, and reading time.
Convert text to uppercase, lowercase, title case, camelCase, snake_case, and kebab-case.
Convert metric and imperial units across 8 measurement categories with live matrix.
Encode plain text to Base64 or decode Base64 back to text.
Generate cryptographically secure random passwords and passphrases.
Combine multiple PDF documents into a single document locally.
Convert PNG, JPEG, and WebP images to multi-page PDF documents.
Solve percentage increases, decreases, fractions, and discounts.
Calculate future investment value with recurring contributions.
Audit CSP, HSTS, X-Frame-Options, and security headers with OWASP grading (A+ to F).
Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Explore modern OKLCH color space with Lightness, Chroma, and Hue sliders and Hex/RGB/HSL conversion
Verify text and UI color combinations against WCAG 2.1 Level AA and AAA accessibility standards.
Convert times across world timezones and compute exact business days.
Convert between Unix timestamps and human-readable UTC/ISO dates.
Preview how your URLs and meta tags render as cards on Twitter, LinkedIn, and Facebook.
Generate Google Knowledge Graph Schema.org Organization structured data.
Calculate API inference cost given prompt and completion token counts.
Design, refine, and structure prompts for Claude, GPT-4, and Gemini.
