Best for
Encoding UTF-8 text for an API field or inspecting Base64 that contains text.
Private browser tool
Base64 Encoder & Decoder
Encode UTF-8 text to Base64 or decode Base64 to text free online. Copy and download results locally without uploading your input or creating an account.
✓ Local processing✓ No uploads✓ No account
TEXT→BASE64
- 1Add input
- 2Choose options
- 3Get result
Next step
Continue working with your file
Simple by design
From file to result in three steps
- 1
Paste text or a Base64 value into Input.
- 2
Select the encode or decode action.
- 3
Inspect and copy or download the local text result.
Practical guidance
When to use Base64
What you get
Standard Base64 when encoding, or UTF-8 text when decoding. This workspace is not a binary file decoder.
Useful tip
Base64 is an encoding, not encryption. Anyone with the value can decode it, so never use it to hide passwords or secrets.
Use Base64 where text transport is required
Base64 is useful when a system accepts text but must carry arbitrary bytes. It is inefficient for normal file storage and does not make data safer.
Know which variant the destination expects
Some URLs and tokens use Base64url, which replaces certain characters and may omit padding. Standard Base64 and Base64url are related but not always interchangeable.
Good to know
Frequently asked questions
Is Base64 encryption?+
No. Base64 only changes how bytes are represented. It provides no secrecy, authentication or tamper protection.
Why is Base64 larger than the original file?+
Base64 represents every three input bytes with four text characters, plus possible padding. The encoded value is normally about one third larger.
What does the equals sign at the end mean?+
One or two equals signs may be padding used to complete the final four-character Base64 group.
Can Base64 contain private information?+
Yes. Encoded content is immediately reversible. Treat it with the same care as the original data.
Does my file leave my device?+
No. This tool processes your file inside your browser and does not send its contents, name or metadata to Filemivo.
Is Base64 free?+
Yes. It is free to use and has no artificial file-size limit. Your browser and device memory determine the practical limit.