Secure and Local JWT Analysis
Instantly translate JWT Header and Payload data into readable JSON format.
Locally test the validity of token signatures with HMAC or RSA keys.
Translate standard claims like exp, iat, and nbf into human-readable dates.
Your tokens never leak to the internet; all operations happen in our WebAssembly core.
JWT tokens often carry sensitive user data. Instead of pasting them into online tools, analyze and verify signatures safely with LocalUsta's completely local tool.
Everything you need to know about the LocalUsta Tools platform.
Encode and decode strings, files, or binary data locally in your browser with high performance and automatic MIME type detection.
Generate and verify MD5, SHA, BLAKE3, CRC32 and Argon2 hashes for text and files.
Test and debug your local development APIs (localhost) completely offline in your browser. Send custom HTTP requests with headers, parameters, and payloads instantly.
Securely decode and analyze your SSL/TLS certificates (.crt, .pem) entirely offline in your browser.
Professional video editing and conversion directly in your browser with FFmpeg.wasm.
Compress, resize, and remove metadata from images 100% locally in your browser.
Compress and optimize images to WebP and AVIF format completely offline in your browser with real-time visual comparisons.
Professional browser-based Secure PDF tool. Sign documents, merge files, sanitize metadata, and compress PDF with 100% client-side security. No uploads, total privacy.
Safely record your screen, webcam, and microphone entirely inside your browser without server uploads. 100% Private.
Create custom placeholder images for your design mockups and web development instantly without external dependencies.
Convert between CSV and JSON formats locally in your browser with separator selection and parsing options.
Secure Diff Checker
Format and minify complex SQL queries instantly in your browser.
Create beautiful, customizable QR codes with logos and colors, or scan existing ones. 100% private and runs locally in your browser.
A high-fidelity unit conversion tool for developers. Convert Data, Time, and CSS units (PX to REM/EM) instantly.
Build, test, and master regular expressions with a comprehensive cheat sheet and real-time match highlighting.
Generate highly secure passwords and measure their strength offline.
Generate, parse, verify, and benchmark Bcrypt and Argon2 password hashes safely in your browser. 100% private.
A secure scratchpad that runs entirely in your browser. Stays saved even if you close your device, but never uploaded to the internet.
Analyze your domain's DNS records (A, MX, TXT, CNAME) in real-time across Google & Cloudflare. Perform free security health checks for SPF, DMARC, and DNSSEC.
Discover, analyze, and map IPv4 and IPv6 addresses. Instantly audit network owner, ASN, CIDR block, Internet Service Provider (ISP), hosting vs residential status, and raw RDAP records in real-time.
Convert Unix timestamps to ISO 8601, UTC, local time, and more. Supports seconds and milliseconds timestamps with real-time updates.
Transform your text into camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, and more. Support for bulk conversion and auto-detection.
Professional developer tool to encode, decode, and parse URLs. Edit query parameters and path segments dynamically, generate code snippets, and scan for security issues.
Convert client-side terminal cURL commands into clean JavaScript Fetch or Axios requests instantly.
Generate secure cron expressions visually using intuitive dropdown selectors or parse and translate cron strings into plain human-readable language instantly.
Write Markdown with side-by-side GitHub-styled preview, or convert HTML to Markdown instantly.
Create gorgeous multi-layered CSS box shadows, text shadows, linear/radial gradients, and glassmorphism presets completely offline.