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Base64 Encoder / Decoder
Encode and decode text strings or binary files to/from Base64 representation. 100% local, offline-capable.
Text Mode
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Frequently Asked Questions
Everything you need to know about processing files securely in your browser
What is Base64 encoding used for?
Base64 encoding converts binary data (like images or files) or special text strings into a safe ASCII string format. It is commonly used for embedding images in HTML/CSS, transferring data in email systems, and sending binary data in JSON payloads.
Is Base64 a form of encryption?
No, Base64 is not encryption. It is a publicly known encoding scheme designed solely to represent binary data in an ASCII format. Anyone can easily decode a Base64 string back to its original form.
Can I encode files to Base64 using this tool?
Yes, you can upload files (such as images, documents, or binaries) and convert them to Base64 strings or HTML Data URIs. The conversion runs entirely client-side without any server uploads.
What is Base64 URL-safe encoding?
Standard Base64 uses + and / characters, which have special meanings in URLs. URL-safe Base64 replaces these characters with - and _ respectively, and removes padding (=), making the resulting string safe to use in query parameters and URLs.