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Encode files to Base64 strings for embedding in JSON and HTML. Free online file to Base64 converter for data URIs. Supports base64, file.
Base64 File Encoder is a free online developer tool that runs entirely in your browser — your files never leave your device and are never uploaded to any server. No installation, no signup; works on both phone and desktop, ready to use instantly.
Code tools designed for developers with syntax highlighting, real-time validation, and formatting. Full coverage of JSON, XML, YAML, SQL, and more.
As developers ourselves, we kept switching between scattered tools that sent our code to unknown servers. We built this developer suite so formatting, validation, and conversion all run locally — your code stays yours.
Yes, completely free with no signup required.
Yes, it works on mobile browsers with touch support.
Developer
Supports JSON, XML, YAML, SQL, CSV, TOML and more, plus code format conversion for Java, Python, TypeScript, etc.
ToolPure supports JSON, XML, YAML, TOML, CSV, SQL, and Markdown formatting. Validation includes syntax checking, schema validation for JSON, and well-formedness checking for XML.
Yes, you can convert between JSON, XML, YAML, CSV, and TOML. The converter preserves data types, nested structures, and array indices during conversion.
Files up to 10MB can be formatted without issues. For larger files, the tools use Web Workers to prevent UI freezing. Syntax highlighting supports files with up to 100,000 lines.
Yes. Base64 File Encoder runs entirely in your browser: files you select are never uploaded to any server — all processing happens in your device's memory and is wiped when you close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.