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Base64 Encoder / Decoder

Last updated: April 2026

Encode text or files to Base64 and decode Base64 back to readable text or downloadable files in a browser-first workflow that stays on your device.

Brand-new tool
Text and file mode
Copy or download output
Browser-only processing
1

Encode or decode Base64

This is a brand-new utility page. Use it to turn plain text into Base64, decode Base64 back into readable text or bytes, or generate a Base64 string from a local file without uploading it anywhere.
No decoded bytes yet Paste Base64 to inspect size and whether it looks like UTF-8 text.
Drop a file here or choose one

For a lighter browser-side experience, keep file encoding jobs at 15MB or smaller.

No file selected Choose a file to generate a Base64 string from its contents.

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What to Expect

Encode plain text or local files into Base64, decode Base64 back into readable text or raw bytes, and download the result without leaving the browser.

Browse Utility Tools

Best for

  • Quick browser-side jobs that solve one practical problem cleanly.
  • Repeat-use utilities such as packaging files, comparing text, or converting values.
  • Workflows where privacy-first local processing improves trust and convenience.

Not ideal for

  • Very large source files or very long batches on older low-memory devices.
  • Heavy desktop-grade editing workflows that need multi-step controls or plugins.
  • Scenarios where you need server-side storage, sync, or background processing.

What this tool keeps

  • A focused single-task interface with clear limits and copy-ready output.
  • The convenience of handling the job directly in the browser where supported.
  • Fast access to practical utilities without signups or forced app installs.

What may need cleanup

  • Browser performance can vary by device, especially on large local files.
  • Some outputs still need a quick human check before you rely on them.
  • Browser feature support can affect folder upload, timezone data, or clipboard access.

Common errors

  • Pasting invalid text or encoded data and expecting the tool to guess the right format.
  • Assuming every file type compresses well inside a ZIP archive.
  • Using the wrong time zone name or measurement category for the task.

Example use cases

  • Encode config snippets, emails, or small payloads into Base64 text.
  • Decode Base64 strings back into readable text or a downloadable file.
  • Generate data URLs or Base64 strings from local files for testing or embedding.

Sample input

Plain text, a Base64 string, or a small local file.

Sample output

Encoded Base64 text, decoded UTF-8 text, or a downloaded binary file.

Who this is for

  • Developers, support teams, technical writers, and anyone working with encoded payloads.

Frequently Asked Questions

Can I encode plain text into Base64 here?

Yes. Paste text into the encoder and the page will convert it into Base64 output you can copy or download.

Can I decode Base64 back into readable text?

Yes. If the Base64 input represents UTF-8 text, the decoder will show the text directly in the browser.

Does this support files too?

Yes. You can convert a local file into Base64 and download the output, with a practical in-browser size limit to keep the page responsive.

Will decoded Base64 always become readable text?

No. Some Base64 input represents binary data such as images or PDFs, so the tool lets you download the decoded file when text preview is not appropriate.