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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 →Offline API Client
Your tokens, endpoint data, and history are kept entirely inside your browser localStorage and IndexedDB. No server uploads, zero latency, total privacy.
Manage and switch between multiple active request instances, methods, and configurations concurrently with ease.
Includes copy-pasteable configuration templates to resolve CORS restrictions in Express, FastAPI, Django, Spring, and Go.
Choose the HTTP action (GET, POST, etc.) and input your localhost or external REST endpoint URL.
Configure Bearer Tokens, Basic Auth, or API Keys in the Authorization tab, and add headers.
Click Send to execute the browser fetch call and render real-time color status and latency.
Export and copy your configured request instantly as a valid terminal cURL snippet.
Test and debug your local development APIs (localhost) completely offline in your browser. Send custom HTTP requests with headers, parameters, and payloads instantly.
Everything you need to know about the LocalUsta Tools platform.
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 and verify MD5, SHA, BLAKE3, CRC32 and Argon2 hashes for text and files.
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.
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.