Base64 Encoder Online Free – UTF-8 & URL-Safe, No Upload

🔤 ➜ 🔐

Base64 Encoder Online Free

Convert any text to Base64 instantly — full Unicode support (emoji, Hindi, Chinese, Arabic all work), optional URL-safe output, live conversion as you type. Built for developers: no upload, unlimited use.

🔒 100% Private — Encoding Happens in Your Browser

🔐 Text to Base64 Converter

🔧 JS ⏳ · Input — · Output — · Engine ⏳

Plain Text 0 chars

Base64 Output 0 chars

URL-safe output (+ becomes -, / becomes _, no padding)

Wrap at 76 chars (MIME style)

🚀 Need to decode Base64 back to text? Use our free Base64 Decoder.

🚀 Working… 0%

🔤 Text🔐 Encode✅ Done

How to Encode Text to Base64 — 3 Easy Steps

1️⃣

Type or Paste Text

Enter any text — plain English, Hindi, emoji, code snippets. Output converts live as you type.

2️⃣

Choose Options

Need it inside a URL? Tick URL-safe. Sending through email systems? Enable 76-char wrapping.

3️⃣

Copy & Use

Copy the result with one tap or download as .txt. Nothing is ever uploaded to any server.

Why Use This Base64 Converter?

🌍

Full Unicode

Emoji, Hindi, Chinese, Arabic — all encode correctly via UTF-8, where most online tools throw errors.

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URL-Safe Mode

One tick swaps + and / and drops padding — perfect for query strings and JWT segments.

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Live Conversion

No convert button needed — output updates on every keystroke with live character counts.

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100% Private

Encoding runs locally in your browser — even passwords and API keys never leave your device.

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MIME Wrapping

Optional 76-character line wrapping for email systems and older infrastructure.

♾️

Unlimited & Free

No character caps, no sign-up, no watermarks. Encode a whole novel if you want.

Popular Use Cases

• 🔐 Prepare HTTP Basic Auth headers in user:password format
• 🌐 URL-safe encode JWT payload segments or API tokens for query strings
• 📧 Debug MIME email attachments and mail-server handshakes
• 🧪 Test API endpoints that expect Base64-encoded request bodies
• 👩‍💻 Build data-URI prefixes for embedding small assets in CSS or HTML
• 📦 Lightly obfuscate simple config values in scripts or links

Pro Tips for Developers

• Base64 is not encryption: it is encoding — reversible by anyone. Never use it to protect secrets.
• URL-safe matters: standard Base64 uses + and / which break URLs; URL-safe mode (- and _) does not.
• Size math: Base64 output is about 33% larger than the input — budget for it in headers and storage.
• Padding: standard Base64 pads with = to a multiple of 4; URL-safe mode here strips padding, which is the JWT convention.
• Round-trip test: paste your output into our Base64 Decoder — you should get your exact original back.

Frequently Asked Questions

Just type or paste your text in the left box — the Base64 output appears instantly on the right. Copy it or download as a .txt file. No button presses needed.

No — Base64 is an encoding, not encryption. It converts data to printable text but offers zero security; anyone can decode it. Use it for transport compatibility, never for protecting secrets.

Yes — fully. This tool converts your text to UTF-8 bytes first, so emoji, Hindi (हिन्दी), Chinese (中文) and Arabic all encode perfectly. Many online tools crash on these because they skip that step.

A variant that replaces + with -, / with _, and removes the = padding — making the output safe to place inside URLs and query strings without extra escaping. It is the format used inside JWT tokens.

Base64 represents every 3 bytes of input as 4 output characters, so the result is always about 33% larger. That is the cost of expressing data using only 64 safe printable characters.

This page encodes text. For files, use a command line tool: certutil -encode on Windows, or the base64 command on Mac and Linux.

No. Encoding runs 100% in your browser with JavaScript. Even passwords, tokens and API keys typed here never leave your device — this page has no server component at all.

Use our free companion tool — the Base64 Decoder. There is also a Go to Decoder button inside this tool. The round trip always restores your exact original text.