25% off your first month — ends in00d00h00m00s

Base64 Encoder

Encode text to Base64 in your browser. Supports full UTF-8. Nothing uploaded.

100% in your browser — files never uploaded.
Preparing tool…
Loading the in-browser engine and verifying you're not a bot.
Postcrest — full AI image suite

Need more than a converter? AI background removal, upscale, edit and generate — one workspace.

Get the AI toolsSee pricing

How to use the Base64 Encoder

  1. 1
    Paste input
    Type or paste — the conversion runs as you type.
  2. 2
    Read output
    Updates live, with errors flagged if input is invalid.
  3. 3
    Copy
    Click Copy or select the output to copy.

About this tool

Base64 encodes binary or text data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /) so it can travel through systems that only handle text — emails, URLs, JSON, data: URIs.

This encoder uses UTF-8 for non-ASCII input, so emoji and non-Latin scripts round-trip safely. Standard Base64 alphabet — no URL-safe variant.

Frequently asked questions

UTF-8?
Yes — non-ASCII text is encoded as UTF-8 bytes first, then Base64.
Is it uploaded?
No, encoding runs in your browser.
URL-safe?
This tool outputs standard Base64. For URL-safe, replace + with - and / with _.
Mobile?
Yes.

Need more than free tools? Get Postcrest's full AI image suite.

AI background removal, AI upscaling, AI image editor and AI photoshoot — every leading model in one workspace.

AI Image Generator
Every leading model — Flux, Nano Banana, Seedream, GPT-Image.
AI Image Editor
Inpaint, outpaint, object removal — describe the edit, AI applies it.
AI Background Remover
Pixel-perfect cutouts in seconds — transparent PNG or any new scene.
AI Image Upscaler
Upscale to 4K, face-aware, print-ready, watermark-free.
Get started — access every AI tool
25% off your first month. Cancel anytime.