Base64 Encode and Decode
Convert text and files to Base64 and back, with proper UTF-8.
- Never leaves your device
- No sign-up
File to Base64
Quick answer: To encode Base64, paste your text and see the result instantly. To decode, switch to Decode and paste the Base64 (data URIs work too). To convert a file or image, use the file area: you get a data URI ready for HTML or CSS.
How to do it in 3 steps
- 1Choose encode or decode.
- 2Paste text or pick a file.
- 3Copy the result.
Why use Pronto Arquivo
Proper UTF-8
Accents and emoji don't break, unlike plain btoa.
URL-safe Base64
The - and _ variant used in JWTs and URLs.
File to Base64
Images and PDFs become data URIs.
Private
Nothing is uploaded; handy for tokens and keys.
Guides
Base64 is not encryption
Anyone can decode Base64. Don't use it to hide passwords.
Frequently asked questions
What is Base64?
A way to represent bytes with 64 text characters, used in email, data URIs and tokens.
How do I decode Base64?
Choose Decode and paste the text.
Why do I get strange characters when decoding?
The content may be binary (an image or PDF), not text.
Is my data sent anywhere?
No. Everything is processed in your browser.
