Developer tools

Browse all tools in the "Developer tools" category.

OGP Checker (web-toolbox.dev)

Free tool for checking OGP (Open Graph Protocol) meta tags of a specified URL. Displays og:title, og:description, og:image, and more, useful for previewing SNS share appearance.

OGP Image Simulator (web-toolbox.dev)

Free tool for previewing how an OGP image will appear when shared on SNS platforms like Twitter, Facebook, and LINE. Useful for checking share card designs.

QR Code Generator (lazesoftware.com)

Generates QR codes from any text or URL, including emoji. Supports customization of background color, foreground color, size, margin, and error correction level.

RGBA to RGB Converter (www.oh-benri-tools.com)

An online tool that calculates the final RGB value by combining an RGBA (transparent color) and a background RGB color. Useful for previewing how a transparent color will actually appear.

ULID Generator (web-toolbox.dev)

Free tool for generating ULIDs (Universally Unique Lexicographically Sortable Identifiers). Useful in system development requiring unique identifiers better suited for lexicographic sorting than UUIDs.

URL Parser (web-toolbox.dev)

Free tool for decomposing a URL into its components: protocol, host, path, query parameters, hash, and more. Useful for checking URL structure and debugging API development.

UUID / GUID Generator (web-toolbox.dev)

Free tool for randomly generating UUID (v4) or GUID values. Generate multiple UUIDs at once, useful for database design and test data creation.

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