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LocalUsta is currently in beta and all tools are free. Some advanced features may become part of a paid plan in the future; we aim to keep the core tools accessible to everyone.
Terms of Service →Secure and Local Base64 Encoding & Decoding
Powered by optimized Rust libraries compiled to WebAssembly for maximum processing speed, even when converting large binary files.
Analyzes the decoded magic bytes to automatically determine the file type (PNG, JPEG, PDF, ZIP, TXT) without manual configuration.
Renders decoded images, text files, and PDFs directly on the screen inside an isolated iframe, allowing quick verification before downloading.
Easily switch between standard RFC 4648 Base64 and URL-safe variants (replacing '+' and '/' with '-' and '_') to prevent URL breaks.
Traditional online Base64 utilities require uploading your sensitive files, API payloads, or secret keys to a remote server, posing severe security risks. LocalUsta performs all operations directly in your browser's RAM memory using a native WebAssembly engine compiled from Rust code. This guarantees 100% data isolation, absolute privacy, and lightning-fast speeds for files up to several megabytes.
Everything you need to know about the LocalUsta Tools platform.
Generate and verify MD5, SHA, BLAKE3, CRC32 and Argon2 hashes for text and files.
Professional developer tool to encode, decode, and parse URLs. Edit query parameters and path segments dynamically, generate code snippets, and scan for security issues.
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.
Encode and decode strings, files, or binary data locally in your browser with high performance and automatic MIME type detection.
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.
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.
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.
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.