LDB Viewer

A browser-based viewer for LevelDB and RocksDB SSTable files. Drop in a .ldb or .sst file and instantly browse its key/value entries — no server, no upload, everything runs locally in your browser.

Features

• Drag-and-drop or click-to-browse file loading
• Supports LevelDB and RocksDB SSTable formats
• Supports uncompressed and Snappy-compressed blocks
• Virtualized table for smooth scrolling through millions of entries
• Search across keys and values with match highlighting
• Displays deleted (tombstone) entries distinctly
• Binary keys/values rendered as readable hex

Getting Started

npm install
npm run dev

Then open http://localhost:5173.

Build

npm run build

Output goes to dist/. You can serve it with any static file server.

Browser Requirements

A modern browser with support for:

• Web Workers (parsing runs off the main thread)
• Web Crypto / ArrayBuffer

Chrome 90+, Firefox 90+, and Safari 15+ all work.

Known Limitations

• The entire file is loaded into memory. Files larger than a few hundred MB may be slow or cause the tab to run out of memory.
• Only no compression (0x00) and Snappy (0x01) block compression are supported. Zstd, LZ4, and other compression types will return an error.
• Checksums (CRC32) stored in block footers are not verified.

Tech Stack

• React + TypeScript
• Vite — build tool and dev server
• TanStack Virtual — virtualized row rendering
• snappyjs — Snappy decompression in pure JS

License

MIT