Base64 Encoder
Encode text or binary data to Base64 online so it can be safely embedded in JSON, HTML, URLs, and configuration files.
base64encodeconvert
Formatting Options
Preview the shared config renderer across simple, choice-based, and multi-select settings.
Overview
Binary data doesn't travel well through JSON, HTML, or email. Base64 turns bytes into text—a string you can paste anywhere. Encode to base64 for data URIs, API payloads, or config that embeds binary. Text to base64, image to base64, whatever needs to cross a text-only boundary. The base64 encode tool runs in the browser; your data never leaves the tab. Convert string to base64 in seconds.
Features
Base64 Encoding
Turn text or binary content into portable Base64 output
Transport Safe
Prepare data for JSON, HTML, or other text-based channels
Copy Ready
Generate encoded content for quick reuse in other tools
Privacy First
All processing happens in your browser
Quick Tips
- •Use Base64 when you need binary-safe text for transport or embedding
- •Remember Base64 increases size, so avoid it for large payloads when possible
- •Use data URIs carefully to avoid shipping oversized assets inline
- •All data stays in your browser - nothing is sent to servers
When this tool helps
Practical situations where this tool is worth opening.
- Embedding a small asset or binary blob into JSON or an HTML data URI.
- Turning raw text into a transport-safe value for systems that only accept plain characters.
- Preparing sample encoded payloads for documentation or tests.
Common mistakes to avoid
A few easy ways these workflows go wrong in practice.
- Treating Base64 as encryption instead of a plain encoding step.
- Inlining large files and making payloads much bigger than necessary.
- Forgetting that some systems expect Base64url rather than standard Base64 characters.
Worked examples
Short examples that show what this tool is useful for.
Encode plain text
Input
hello world
Output
aGVsbG8gd29ybGQ=
Useful when a system expects text-safe binary content.
FAQ
Clarifications people often need before using the output.
Related guides
Original reading that explains the workflow around this tool.
A field guide to using Base64 for transport, embedding, and debugging without confusing encoding for encryption.
5 min read