DevOkk

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DevOkk is a free, browser-based toolkit offering 100+ utilities for developers and everyday technical work. Tools are organized into categories including JSON (formatter, viewer, validator, schema validator, JSON-to-graph visualizer, and more), converters (XML/CSV/YAML to JSON, timezone conversion), image tools (compression, format conversion including HEIC/WebP/SVG), PDF tools (compress, merge, split, encrypt, sign, redact, convert to/from Word/Excel/HTML, and more), security tools (Base64 encoding, hash generation, JWT decoding, UUID generation, password strength checking), networking diagnostics (DNS lookup, SSL certificate checker, HTTP header viewer, ping test, API tester), SEO tools (meta tag extractor, Open Graph preview, SERP snippet preview), CSS/design tools (color studio, animations, favicon generator), validators (JSON, CSS, JavaScript, XML, YAML, credit card checksum), and a large library of scientific, math, unit-conversion, and health/fitness calculators. Most tools run entirely client-side in the browser, requiring no account creation, installation, or file uploads to external servers.