Base64 Encoder & Decoder
100% Local Browser ProcessingDeveloper SuiteBase64 Encoded / Decoded Result
Input text or upload file on the left to see converted output here.
How to Encode & Decode Base64 Online
Encode text, code, images, and files to Base64 Data URIs or decode Base64 strings back to downloadable files inside browser memory.
Input Text, Image or File
Paste raw text/code, upload an image (PNG, JPG, WebP, SVG), or drag & drop any file to encode or decode instantly.
Select Mode & Options
Choose your mode (Text/Code, Image to Base64, Base64 to Image, File to Base64) and toggle URL-Safe Base64 (RFC 4648) if needed.
Copy Snippets or Download
Copy raw Base64 data URIs, HTML <img> tags, CSS background snippets, or download the decoded image/file directly.
Base64 Formats & Data URI Reference Rules
Understand how plain text, JSON, PNG/JPG images, SVG vectors, and URL-safe Base64 strings format across web apps.
| Encoding Type | Sample Input | Base64 Output Format | Primary Use Case |
|---|---|---|---|
| UTF-8 Plain Text / JSON | Hello World! {"user": "Alex"} | SGVsbG8gV29ybGQhIHsidXNlciI6ICJBbGV4In0= | API auth headers, basic authentication, config strings |
| PNG / JPG Image Data URI | sample_photo.png (Binary buffer) | data:image/png;base64,iVBORw0KGgoAAAANSUhEUg... | Embedding images directly in HTML/CSS without external HTTP requests |
| SVG Vector Image | <svg width="100" height="100">...</svg> | data:image/svg+xml;base64,PHN2ZyB3aWR0aD0... | Inline UI icons, email templates, mobile app graphic assets |
| URL-Safe Base64 (RFC 4648) | Subject? + Key/Token | U3ViamVjdD8gKyBLZXkvVG9rZW4 (No padding =) | Web tokens (JWT), URL query parameters, webhooks |
Why Use Meema Tools Base64 Coder?
Built for maximum web developer productivity, RFC 4648 accuracy, and 100% client-side security.
Multi-Format Base64 Engine
Encode and decode text, code, images (PNG, JPG, WebP, SVG, GIF), and binary document files instantly.
100% In-Browser Privacy
Zero file bytes or text payloads leave your computer. All processing happens locally in your browser.
HTML & CSS Snippet Generator
Generate 1-click copyable HTML <img> tags and CSS background-image snippets for web developers.
URL-Safe Base64 (RFC 4648)
Toggle URL-safe Base64 mode for web parameters, tokens, and web request headers.
Frequently Asked Questions
About Base64 Encoding
Everything you need to know about Base64 encoding, Data URIs, image conversion, and browser privacy.
100% Confidentiality
All Base64 encoding & decoding runs locally on your computer. Zero code bytes touch any external server.
Base64 encoding converts binary data or non-ASCII text into a string of 64 printable ASCII characters. It is commonly used to send images, binary payloads, and credentials securely inside text formats like JSON, XML, HTML, or email headers.
Click 'Image to Base64', drag & drop your image or click 'Upload File', and our engine instantly converts it into a data URI (`data:image/png;base64,...`) along with ready-to-use HTML `<img>` and CSS background snippets.
Select 'Base64 to Image', paste your Data URI or raw Base64 string into the input box, and Meema Tools will render a live preview along with a 'Download Image' button.
Yes, 100% private and secure! All encoding and decoding execute entirely inside your browser's local JavaScript runtime. Zero file bytes or text strings leave your device or touch external servers.
Standard Base64 uses `+` and `/` characters which can break web URLs. URL-Safe Base64 (RFC 4648) replaces `+` with `-` and `/` with `_`, making it safe for query parameters and URL paths.
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