Text Base64

Base64 Encoder

Encode text or any file to Base64 in your browser. Free, private, and fast. Create data URIs and API-safe payloads without uploading anything.

Drag & drop your Text file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert Text to Base64?

Base64 encoding turns any data — text or binary — into safe ASCII characters that survive JSON payloads, HTTP headers, data URIs, and email. Paste text or upload any file (an image, a PDF, a certificate) and get its Base64 representation instantly. Files are encoded byte-for-byte, so the output can be decoded back to an identical copy.

Common use cases

  • You have a Text file and need it in Base64 format for embedding images as data uris in html/css.
  • The target software or platform requires Base64 but your file is in Text.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: Base64 output is ~33% larger than the original data and is an encoding, not encryption — it provides zero confidentiality.

How to Convert Text to Base64

  1. Upload or drop your Text file into the converter above.
  2. Adjust any output settings for Base64 if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

Text (Plain Text)

Plain text is the simplest possible data format: a sequence of characters with no styling or structure. It is the universal input and output of every text tool, from encoders to case converters.

Compatibility: Universal — readable on every device and operating system ever made.

Base64 (Base64 Encoding)

Base64 is a binary-to-text encoding that represents any data using 64 safe ASCII characters. It lets binary content — images, files, credentials — travel through channels that only handle text, such as JSON payloads, data URIs, email attachments, and HTTP basic authentication.

Compatibility: Universal — every language and browser encodes/decodes Base64 natively.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

More Text Conversions

URL Encoder Case Converter

Need the reverse?

Base64 Decoder

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.