Base64 Decode
Decode standard Base64 to text.
How to use Base64 Decode
Base64 Decode — Alternate URL for the same tool. Decode standard Base64 back to text, including padding. Free to use in D2i DevTools — no account required.
Steps
- Fill in Input. This field is required.
- Click Run and copy the result under the form.
Frequently asked questions
What is Base64 Decode used for?
Use it to read a Base64 field from JSON, a certificate blob, or a data URL payload.
How do I use the free online Base64 Decode tool?
Fill in Input. This field is required. Click Run and copy the result under the form.
What can I paste or upload into Base64 Decode?
Paste Base64 that uses + and / and optional whitespace around it. URL-safe alphabets (- and _) are not accepted here.
What output does Base64 Decode give me?
The decoded text. Binary that is not valid UTF-8 may look garbled. hello encoded is aGVsbG8=.
Is Base64 Decode free, and is my input private?
Yes — Your input is processed in memory for this request only. It is not saved to disk or the database, and it is cleared after the tool finishes.
The decoder says the input is illegal. What should I check?
Confirm you did not pass Base64url (- and _ with no padding). Strip a data: URL prefix if you pasted a whole data URL, and keep the = padding.
Inputs are processed in memory only and are not saved to disk or the database. Data exists only for the duration of your request.