File to Base64 Encoder
Upload any file and get its Base64 encoded string or data URL instantly.
Upload any file type — image, PDF, DOCX, ZIP, font, or other — to get its Base64 string and data URL. Everything is processed locally in your browser; nothing is uploaded to any server.
Drop any file here or click to upload
Any file type supported
What is File to Base64 encoding?
Base64 encoding converts binary file data into a plain ASCII text string. This makes it possible to embed any file — images, PDFs, fonts, ZIP archives — directly inside HTML, CSS, JSON, or any text-based format without a separate network request.
Common uses include embedding images in CSS as data URLs, attaching files to JSON API payloads, encoding email attachments in MIME format, and storing small binary assets inside databases or configuration files.
Raw Base64 vs Data URL
The raw Base64 string is just the encoded data with no type information — useful when the receiving system already knows the format or when you need to pass the string inside a JSON field.
A data URL includes the MIME type prefix in the format data:mime/type;base64,... and can be used directly as an image src, CSS background-image, or href value in the browser without any extra steps.
Encode any file to Base64
This file to Base64 converter turns any file — PDF, image, document, audio or ZIP — into a Base64 string or a ready-to-use data URL. Drop a file in and copy the result, or download it as a text file. The file is read in your browser and never uploaded.
How to convert a file to Base64
- Drag and drop a file onto the box, or click to choose one. Any file type works.
- Check the file name, size and type shown.
- Choose the output: Raw Base64 or Data URL.
- Click copy, or Download as .txt to save the Base64 text.
Raw Base64 vs data URL
| Format | Looks like | Use it for |
|---|---|---|
| Raw Base64 | JVBERi0xLjQK... | JSON and API payloads, databases, email attachments |
| Data URL | data:application/pdf;base64,JVBERi0... | HTML img and a tags, CSS backgrounds, embedding files directly in a page |
When to use Base64
- Sending a file inside a JSON request to an API that only accepts text.
- Embedding small icons or images directly in HTML or CSS to save a request.
- Storing small files in a text column of a database.
- Testing upload endpoints and webhooks.
Base64 makes files about 33% larger, so it is best for small files. For large files, upload them normally and pass a link instead.
Frequently asked questions
Is my file uploaded anywhere?
No. The file is read with your browser FileReader and the Base64 is created on your device.
Is Base64 encryption?
No. Base64 is an encoding, not encryption — anyone can decode it. Do not use it to protect sensitive data.
How do I turn Base64 back into a file?
Use the Base64 to File decoder to paste the string and download the original file.
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