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Input Base64
Convert files and text to Base64 instantly. Support for images, PDF, audio, video, SVG, HTML, JSON, XML, CSV, text, and binary files. 100% free with local processing.
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Encode and decode images (PNG, JPG, GIF, WebP, SVG), PDFs, audio, video, HTML, JSON, XML, CSV, text, and binary files in a single tool.
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All processing is done locally in your browser. Your files are never uploaded to any server. Ideal for confidential documents and sensitive data.
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Encode and decode files in milliseconds. No waiting, no processing queues. Optimized to handle large files.
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Copy the Base64 result to your clipboard with one click or download the decoded file in its original format. Simplified workflow.
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Works perfectly on desktop, tablet, and mobile. Encode from anywhere without installing additional software.
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Convert files to Base64 and vice versa. Also supports plain text encoding for URLs, HTTP authentication, and more.
Drag and drop your file (image, PDF, audio, etc.) into the upload area, or paste the Base64 text you want to decode. You can also use the file picker to browse your device.
Select whether you want to convert your file to Base64 (encode) or if you have Base64 text and want to recover the original file (decode). The tool automatically detects the file type.
Get your result instantly. Copy the Base64 string to your clipboard to use in your code, or download the decoded file in its original format. You can also preview images, PDFs, and multimedia content directly.
Web Development
Embed images and SVGs directly in HTML/CSS using data URIs. Reduce the number of HTTP requests and improve loading performance for small icons and graphics.
APIs & Microservices
Transmit binary files (images, PDFs) in REST or GraphQL APIs by encoding them as Base64 text within the JSON body of the request.
Email & Newsletters
Embed images in emails and newsletters so they display correctly without relying on external servers. Avoid image blocking by email clients.
Database Storage
Store small images, icons, or documents directly in the database as Base64 text. Useful for applications that don't want to manage file storage.
Authentication & Security
Encode access credentials for HTTP Basic authentication. Securely transmit API tokens and keys in HTTP headers.
Digital Signatures & QR Codes
Convert digital signatures, QR codes, and certificates to Base64 for portable transmission or storage in any system.
1<!-- Image in HTML with Base64 -->2<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA..." 3 alt="Embedded image" />4 5<!-- SVG in CSS with Base64 -->6<style>7.logo {8 background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0i...");9}10</style>11 12<!-- PDF in iframe with Base64 -->13<iframe src="data:application/pdf;base64,JVBERi0xLjQKJcOkw7..."></iframe>| Característica | Our Tool Mejor opción | Other Online Tools |
|---|---|---|
| Data Privacy | 100% local processing | Files are uploaded to server |
| Size Limit | No artificial limits | 5-10 MB restrictions |
| Supported Formats | +15 formats | Only images or text |
| Speed | Instant (local) | Depends on server |
| Preview | Images, PDF, video, audio | Limited or nonexistent |
| Registration Required | Not required | Frequently requires account |
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User Rating
"The best Base64 tool I've ever used. I encode images for my newsletters without worrying about privacy. The fact that it's local gives me complete peace of mind."
"I use the Base64 decoder daily to extract PDF files from API responses. It's fast, accurate, and I don't need to install anything. Simply perfect."
"Finally a tool that supports audio and video encoding in addition to images. Ideal for my work with multimedia content in web applications."
Base64 is an encoding system that uses 64 characters (uppercase letters A-Z, lowercase a-z, numbers 0-9, and the + and / symbols) to represent binary data. Each Base64 character represents 6 bits of information. It is widely used because it converts any type of binary file into ASCII text that can be transmitted without corruption in text-only systems.
Yes. Base64 encoding increases file size by approximately 33%. This is because every 3 bytes of binary data are converted into 4 Base64 characters. For example, a 300 KB image will become a Base64 string of approximately 400 KB. This is why it's recommended to use Base64 mainly for small files or when direct embedding provides performance benefits.
Absolutely safe. Our tool works entirely in your browser using JavaScript. Your files never leave your device: they are not uploaded, not stored, and not shared with third parties. You can encode confidential documents, private images, or any sensitive files with complete peace of mind.
Yes, but keep in mind that processing is done on your device, so performance depends on your hardware and browser. For files up to 50 MB, the process is fast and smooth. For larger files, we recommend using a modern browser like Chrome or Firefox. Also consider that the Base64 result will be 33% larger than the original file.
Base64 strings have multiple applications: <strong>1)</strong> Embed images in HTML/CSS using data URIs (<code>data:image/png;base64,...</code>). <strong>2)</strong> Send files in JSON APIs. <strong>3)</strong> Store files in databases as text. <strong>4)</strong> Embed images in emails. <strong>5)</strong> Transmit credentials in HTTP Basic authentication. <strong>6)</strong> Create data URLs for automatic downloads.
Yes, Base64 decoding is a lossless reversible process. When you decode a Base64 string, you get the original binary file byte by byte. However, it's important to know the original file type (image, PDF, etc.) to save it with the correct extension. Our tool automatically detects the MIME type when possible.
Standard Base64 uses the + and / characters, which have special meanings in URLs. URL-safe Base64 (also called "Base64 URL-safe") replaces + with - and / with _, and removes the = padding at the end. This makes the string safe to include in URLs, filenames, and query parameters without additional encoding.
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