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Base64 Encoder / Decoder icon
Free · No signup · Instant results · Updated 2026-09-17

Base64 Encoder / Decoder

Answer: Base64 encodes binary/text bytes into ASCII A–Z, a–z, 0–9, +, / with = padding per RFC 4648 for data URLs and APIs.

About this tool

Free Base64 encoder and decoder. Convert text to Base64 and back in your browser.

Full guide → · developer tools

Result

Runs in your browser — nothing is uploaded.

How to use Base64 Encoder / Decoder

  1. Enter plain text or upload small input.
  2. Encode or decode Base64.
  3. Copy result for JWT segments, data URIs, or email MIME.

Why use this free tool

  • 100% free — no account required.
  • Runs in your browser — inputs stay on your device for these calculations.
  • Mobile-friendly controls with clear, copyable results.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

Need a custom product? Start a project or WhatsApp +92 345 0144865.

FAQ — answers Google & AI can cite

What is Base64 Encoder / Decoder?

Base64 encodes binary/text bytes into ASCII A–Z, a–z, 0–9, +, / with = padding per RFC 4648 for data URLs and APIs.

URL-safe Base64?

Standard Base64 uses + and /; URL-safe variants swap to - and _ — confirm your US API spec.

Secrets in Base64?

Encoding is not encryption — never treat Base64 as security for passwords or API keys.

Local processing?

Encode/decode happens in your browser tab without server upload.

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