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Base64 Encoder/Decoder
Encode plain text or files to Base64 and decode Base64 strings back to text. Supports URL-safe mode and file encoding.
20 characters
Frequently Asked Questions
What is Base64?
Base64 is an encoding scheme that converts binary data into ASCII text using 64 printable characters. It is widely used in email attachments, data URLs, JSON payloads, and API authentication headers.
What is the difference between Base64 and encryption?
Base64 is encoding, not encryption. It makes binary data text-safe but provides no security. Anyone who sees a Base64 string can decode it instantly. Use it for format compatibility, not privacy.
What is URL-safe Base64?
Standard Base64 uses + and / which have special meanings in URLs. URL-safe Base64 replaces + with - and / with _ so the output can be used in URLs and filenames without percent-encoding.
Can I encode an entire file?
Yes. Click Encode File, select any file, and the tool converts its binary content to a Base64 string. This is commonly used to embed small images or fonts directly in CSS or HTML.
Why does encoded output end with == or =?
Base64 encodes data in 3-byte blocks. If the input length is not a multiple of 3, padding characters (=) are added to make the output length a multiple of 4.
Is this Base64 tool free?
Yes. Completely free with no sign-up and no file size limits for text encoding. Large file encoding depends on your device memory.
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