Base64 Encoder
Encode text, files, and images to Base64 — UTF-8 safe with data URL output. No uploads, fully private.
Input
Base64 Output
Result appears here…By Vizo ToolLast updated August 20264 min read
Base64 Encoder — Encode Text, Files & Images to Base64
The Base64 Encoder converts any text, file, or image into a Base64 string right in your browser. Perfect for embedding images into HTML, CSS, or emails, passing binary data through JSON APIs, or preparing data for applications that only accept ASCII.
Unlike many online tools, it handles UTF-8 text correctly (emoji and non-Latin scripts included) and can encode full files into data URLs with a single click. Everything runs locally, so your files are never uploaded.
- Text, file & image input
- UTF-8 safe
- Copy & download
- 100% browser-based
Why Use Base64 Encoder?
Text, File & Image Modes
Encode plain text, whole files, or images — including data URL output.
Correct UTF-8 Handling
Emoji, Arabic, Chinese, and other non-Latin1 text encode without corruption.
Data URL Ready
Get ready-to-paste data URLs for HTML img tags, CSS, and emails.
Private & Free
Encoding runs in your browser — files never leave your device.
Features
Text Encoding
Encode any string, with a live character and byte counter.
File Encoding
Select any file and get its Base64 representation instantly.
Image Data URL
Encode an image and copy the full data:image/... URL for inline use.
Copy & Download
Copy the result or download it as a .txt file.
Decode Built In
A toggle switches to decoding so one page handles both directions.
How to Encode to Base64
Encode text or a file in three steps.
Pick an input mode
Choose Text, File, or Image depending on what you want to encode.
Enter or select your data
Type your text, pick a file, or choose an image from your device.
Copy or download
Copy the Base64 string or data URL, or download it as a file.
Frequently Asked Questions
Got questions? We've got answers.
What is Base64?▼
Base64 is an encoding that represents binary data as ASCII text using 64 characters. It's widely used to embed files in HTML, CSS, JSON, and emails.
Is the Base64 encoder free?▼
Yes, completely free with no sign-ups or usage limits.
Are my files uploaded?▼
No — encoding happens entirely in your browser, so your data never leaves your device.
Does it support emoji and non-English text?▼
Yes. The tool encodes UTF-8 correctly, so emoji and scripts like Arabic, Chinese, and Hindi work perfectly.
What is a data URL?▼
A data URL embeds the file content directly in the URL (data:image/png;base64,...). It's used to inline images in HTML, CSS, and email.
Can I encode an image to paste into HTML?▼
Yes — use Image mode, then copy the data URL and put it in an <img src="..."> tag.
Can I download the encoded output?▼
Yes, the result downloads as a .txt file with one click.
What's the difference between Base64 and URL-safe Base64?▼
URL-safe Base64 replaces + and / with - and _ so the output can appear in URLs without encoding. This tool outputs standard Base64.
Does encoding increase file size?▼
Yes, Base64 inflates data by roughly 33%. The encoded string is a text representation, not a compression format.
Can I encode a file larger than my browser memory?▼
Extremely large files may be slow, but typical files (up to tens of MB) encode quickly in modern browsers.
Does it work on mobile?▼
Yes, the tool works on desktop, tablet, and mobile browsers.
Why is my encoded text different from other tools?▼
Differences usually come from UTF-8 handling. This tool is UTF-8 correct, matching standards like TextEncoder.
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