SuperSeaArea
Extensions (14)
Multi-Link Opener with Groups
Open multiple URLs in one click, grouped for easy management. Ideal for developers, researchers, and productivity enthusiasts.
Quick QR Code Generator
A simple, fast, and customizable QR code generator with color and logo support.
Markdown Preview
A live Markdown editor with rendered HTML preview. GitHub-flavoured, runs fully in your browser, no network.
Hash Tool — SHA-1/256/384/512
Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text. Fully local via the browser's WebCrypto. No data leaves your device.
Quick Notes
Take quick text notes that persist locally in your browser. Search, edit, delete — no accounts, no sync.
Diff Checker
Compare two texts line by line. Added and removed lines are clearly marked; counts shown at a glance. Fully local.
Image Converter
Convert images between PNG, WebP and JPEG and optionally resize them — fully in your browser, no uploads.
Contrast Checker
Compute the WCAG contrast ratio between two colors and see which AA / AAA bars you pass. Fully local.
Base64 / URL / Hex Tool
Encode and decode text between plain, Base64, URL-encoding and Hex. Live, fully local, handles UTF-8 correctly.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text — words, sentences, or paragraphs. Instant, fully local.
JWT Decoder
Decode a JWT's header and payload locally. Signature is NOT verified — never paste production tokens. Stays on your device.
Password Generator
Generate strong, cryptographically random passwords entirely on your device. No accounts, no servers, never logged.
Calculator
Simple calculator with scientific mode and calculation history. Supports keyboard input.
JSON Formatter
Format, minify and validate JSON locally with precise line+column errors. No data leaves your device.