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Fast, private in-browser formatters, decoders, regex testers, and cryptographic utilities for modern engineering workflows.
Modern development requires frequent data inspection, token decoding, string sanitation, and format transformations. Sending confidential API tokens or customer payloads to random online utilities creates severe security vulnerabilities. ToolsHub Pro guarantees complete client-side execution using WebCrypto and WASM.
JWT payloads, JSON secrets, and tokens never leave your local machine or touch remote logs.
No network round-trips: transformations run immediately in memory using optimized client JavaScript.
Streamlined ergonomics with one-click clipboard copying and clear error inspection.
Every tool runs 100% locally in your browser with zero latency and complete privacy.
Format and beautify JSON instantly.
Validate JSON and find errors instantly.
Decode and inspect JWT headers, payload claims, and expiration.
Generate random UUIDs instantly.
Encode and decode Base64 instantly.
Convert Unix epoch timestamps to UTC, local dates, and ISO 8601.
Test regular expressions with live match highlighting and flags.
Convert HEX, RGB, HSL, and CMYK colors with WCAG contrast.
Compare two text blocks to inspect additions and deletions.
Common questions about using our tools for software engineers & developers.
Yes. All processing is strictly sandboxed in your browser's local JavaScript runtime. ToolsHub Pro has zero server endpoints that receive or log your input payloads.
Yes, the Regular Expression tester supports standard ECMAScript regular expressions with global (g), case-insensitive (i), and multiline (m) flags with real-time match highlighting.
Yes. All UUID v4 identifiers are generated using the browser's native window.crypto.getRandomValues API, providing cryptographically strong randomness.
Discover specialized browser toolkits tailored for different workflows.