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How to Use Base64 Encode/Decode: Complete Guide (2026)
Learn how to use base64 encode/decode free online — no signup, no download. Follow our step-by-step guide below.
What is Base64 Encode/Decode?
The classic Base64 encoder and decoder. Encode files or text for safe transmission in JSON, XML, HTML, or email. Decode Base64 strings back to original data. Supports file upload and drag-and-drop.
- 100% browser-based — no data uploaded to servers
- Free to use — no signup required
- Instant results — no waiting
- Works on all devices — mobile, tablet, desktop
How to Use Base64 Encode/Decode: Step-by-Step
- 1
Encode text or file
Type text or drag a file into the input area to encode to Base64.
- 2
Decode Base64
Paste a Base64 string to decode it back to original text or download as a file.
- 3
Copy or download
Copy the encoded string to clipboard or download the decoded file.
Common Use Cases
Email attachments
Base64-encode file attachments for MIME email transmission.
HTML image embedding
Convert small images to Base64 data URIs to reduce HTTP requests.
API payloads
Safely encode binary data for inclusion in JSON or XML API requests.
FAQ About Base64 Encode/Decode
Does Base64 compress data?
No. Base64 actually increases data size by about 33%. It is for encoding, not compression.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it. For secure data, use AES or bcrypt.
Is my data private?
Yes. All encoding happens in your browser. Files are never uploaded to any server.
Ready to Try Base64 Encode/Decode?
No signup. No download. 100% free.