What is Base64?
Base64 turns binary data into plain ASCII text using 64 characters (A–Z, a–z, 0–9, + and /), so it can travel safely through email, URLs, JSON and HTML. It is an encoding, not encryption — anyone can decode it, so never treat Base64 as a way to hide secrets. The URL-safe option swaps + and / for - and _ and drops the padding, which is the variant used in JWTs and web tokens.
Files and images
Any file can be converted to a Base64 data URL — the format used to embed images directly in CSS and HTML. The decoder below the file tool turns Base64 back into a viewable, downloadable image.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is a public encoding — anyone can decode it instantly. Use real encryption for secrets.
Why is the Base64 output longer than my text?
Base64 stores 3 bytes in 4 characters, so output grows by about 33%.
Can I decode a SHA or MD5 hash here?
No — hashes are one-way and cannot be decoded by anyone. Tools claiming to "decrypt SHA-256" are fake; this tool only handles Base64.
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