Drag & Drop Certificate
Upload a .crt or .pem file to decode its contents offline.
Upload a .crt or .pem file to decode its contents offline.
All certificate decoding is performed securely in your browser using a high-performance WebAssembly engine. No data is sent to any server.
Quickly verify if your SSL/TLS certificate is currently valid or expired with clear, color-coded status badges.
Extract and display essential fields including Subject, Issuer, Serial Number, Signature Algorithm, and Subject Alternative Names (SANs).
The Certificate Inspector is an advanced offline tool that allows you to decode and analyze SSL/TLS certificates (X.509) directly within your browser. By simply dragging and dropping a `.crt` or `.pem` file, you can instantly view critical information such as the expiration date, issuer details, Subject Alternative Names (SANs), and signature algorithms. The tool processes everything locally using WebAssembly, ensuring that your sensitive certificate data never leaves your device.
Everything you need to know about the DevUsta Tools platform.
Secure and Local JWT Analysis
100% Private Base64 converter. Encode and decode strings locally in your browser using WebAssembly. Convert Base64 to image or PDF safely.
Secure and local scratchpad.
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.
Professional video editing and conversion directly in your browser with FFmpeg.wasm.
Safely record your screen, webcam, and microphone entirely inside your browser without server uploads. 100% Private.
Professional browser-based Secure PDF tool. Sign documents, merge files, sanitize metadata, and compress PDF with 100% client-side security. No uploads, total privacy.
Format, validate, and beautify your JSON data with a sleek, user-friendly interface.
Secure and Local SVG Optimization
Compress, resize, and remove metadata from images 100% locally in your browser.
Squoosh-Style Offline Visual Compressor
Secure Diff Checker
Format and minify complex SQL queries instantly in your browser.
Create custom QR codes with logos, colors, and unique shapes. Scan QR codes securely from your camera or images. Everything runs locally in your browser for maximum privacy.
Build, test, and master regular expressions with a comprehensive cheat sheet and real-time match highlighting.
Convert client-side terminal cURL commands into clean JavaScript Fetch or Axios requests instantly.
Generate highly secure passwords and measure their strength offline.
Create custom placeholder images for your design mockups and web development instantly without external dependencies.
Create gorgeous multi-layered CSS box shadows, text shadows, linear/radial gradients, and glassmorphism presets completely offline.
Test and debug your local development APIs (localhost) completely offline in your browser. Send custom HTTP requests with headers, parameters, and payloads instantly.