How to Encode and Decode Base64 (Text, URLs & Data)
Base64 encodes binary or text data as plain ASCII so it can travel safely inside URLs, JSON, data URIs, and tokens without breaking. Kitolity encodes and decodes it instantly in your browser — nothing you paste is uploaded.
The tool
Base64 Encoder & Decoder
Step by step
- Open the Base64 toolGo to the Base64 Encoder & Decoder — it runs entirely in your browser.
- Choose encode or decodePick Encode to convert text to Base64, or Decode to turn Base64 back into text.
- Paste your inputPaste the text or Base64 string you want to convert.
- Copy the resultCopy the output instantly — nothing you paste ever leaves your device.
What is Base64 actually used for?
It’s everywhere in web development: embedding small images directly in CSS/HTML as data URIs, encoding credentials in HTTP Basic Auth headers, packing binary data into JSON, and encoding parts of JWT tokens. It is an encoding, not encryption — anyone can decode it, so never use it to hide secrets.
Is Base64 secure?
No — and it isn’t meant to be. Base64 is reversible by design; it only makes data safe to transmit, not private. If you need to protect data, encrypt it; Base64 is for transport, not security.
Frequently asked questions
Can it decode Base64 back to text?
Yes — switch to Decode mode and paste any Base64 string to get the original text back.
Is it private?
Yes — encoding and decoding run entirely in your browser, so nothing you paste is ever uploaded.
Is Base64 encryption?
No — it is a reversible encoding, not encryption. Never use it to hide sensitive data.