Base64 conversion workflow
Encode or decode Base64 text and files
Base64 turns binary data into safe ASCII text for APIs, data URIs, and email. The Base64 encoder and decoder handles both directions locally, including file uploads, so nothing leaves your browser.
The fast workflow
Follow the same short workflow every time so the result is predictable.
Choose the direction
Encode converts text or files to Base64; decode converts Base64 back to the original value.
Paste or open a file
Paste text directly or open a local file for binary content such as images.
Run the conversion
The result updates instantly and can be copied or downloaded.
Use the output
Embed the result in a data URI, an API payload, or an email attachment.
Base64 is an encoding, not encryption
Base64 is a reversible text representation: anyone can decode it without a key. It is designed for transport, not for confidentiality.
For real protection, use encryption with a secret key. The hash generator is also not encryption; hashes are one-way fingerprints, which is what makes them right for checksums.
Common problems
- Treating Base64 as encryption, when it is only an encoding
- Forgetting the padding character = at the end of the output
- Sending large files as Base64 when binary transfer is available
Best practices
- Use standard Base64 with padding for interoperability
- Remember Base64 grows data by about 33 percent
- Never put secrets in Base64 and call them protected
Frequently asked questions
Is Base64 the same as encryption?
No. Base64 is an encoding that anyone can reverse. It adds no secrecy, only safe transport over text-based channels.
Why does Base64 output end with = signs?
Padding characters are added so the output length is a multiple of 4. Decoders use them to restore the exact original bytes.
Can I encode an image to Base64?
Yes. Open an image file and the tool outputs its Base64 form, ready for a data URI or an API payload.
Does Base64 make data smaller?
No. Base64 grows data by about 33 percent because it packs 6 bits into each ASCII character.
Your data stays local
Everything runs in your browser. Files and values are never uploaded or stored.
Open Base64 Encoder Decoder