What is Base64 encoding used for?

Base64 is a binary-to-text encoding scheme that translates binary data into an ASCII string format using 64 printable characters (A-Z, a-z, 0-9, +, /). It is commonly used to safely transmit binary data through media designed for text, such as embedding images in HTML/CSS, sending email attachments (MIME), or passing authorization tokens.

Is URL encoding the same as Base64?

No. URL encoding (also known as percent-encoding) replaces unsafe or reserved ASCII characters with a '%' followed by their two-digit hexadecimal representation (e.g., a space becomes '%20'). It ensures URLs conform to the URI standard. Base64, by contrast, encodes entire strings or binary blobs into a uniform 6-bit representation.

Is my data safe when I use this tool?

Yes, 100%. All Base64 and URL encoding and decoding operations happen locally inside your web browser using client-side JavaScript APIs (TextEncoder, TextDecoder, btoa, atob, encodeURIComponent). No text or files are ever sent to our servers or stored anywhere.

Does this Base64 tool support emojis and non-English text (UTF-8)?

Yes! Unlike traditional web tools that throw 'InvalidCharacterError' on characters outside the Latin1 range, ToolWala AI uses a UTF-8 safe TextEncoder/TextDecoder wrapper, correctly preserving Hindi, Arabic, Japanese, accents, and emojis.

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B64

Developer Utilities

Base64 & URL Encoder-Decoder

Instant Two-Way Conversion • Full UTF-8 Unicode Support • Zero Server Upload

Encode and decode plain text, tokens, API credentials, and web URLs. Runs 100% locally in your browser memory for maximum privacy and zero latency.

Zero Server Tracking UTF-8 & Emoji Safe Instant Real-Time

🟢 Successfully Encoded to Base64

220 bytes (220 chars)

Plain Text / Source Input

137 chars • 165 bytes

3 lines

Base64 Output

220 chars • 220 bytes

VG9vbFdhbGEgQUkg4oCUIFplcm8tVXBsb2FkIFByaXZhY3khIPCfmoAK4KSo4KSu4KS44KWN4KSk4KWHIOCkpuClgeCkqOCkv+Ckr+CkviAoSGVsbG8gV29ybGQgaW4gSGluZGkpCnsic2VydmljZSI6ICJCYXNlNjQgJiBVUkwgRW5jb2Rlci1EZWNvZGVyIiwgImluQnJvd3NlciI6IHRydWV9

1 line

Zero-Upload Privacy Architecture: All encoding and decoding operations run 100% locally inside your web browser sandbox using native browser APIs. No strings, tokens, passwords, or query parameters are ever transmitted to any remote server or stored in logs.

Developer Guide & Technical Reference

Understanding Base64 & URL Percent-Encoding

Everything developers need to know about binary-to-text encodings, URI safety, and RFC standards.

What is Base64 Encoding?

Base64 is a binary-to-text representation scheme designed to encode arbitrary binary data or text strings into an ASCII format. It divides binary sequences into 6-bit chunks, where each 6-bit integer maps to one of 64 printable characters: A-Z, a-z, 0-9, +, and /, with = used for byte padding.

Because legacy network protocols like SMTP (email) and HTTP headers were built to transport 7-bit ASCII text, raw binary bytes could be corrupted during transit. Base64 guarantees that data passes through any gateway intact without modification.

3 Raw Bytes (24 bits) → 4 Base64 Chars (33% size increase)

Common uses: Basic Auth headers, JWT payload inspection, inline data URIs in CSS/HTML, email MIME attachments.

What is URL Encoding (Percent-Encoding)?

URL Encoding (governed by RFC 3986) transforms characters that are not permitted or reserved in a Uniform Resource Identifier (URI) into a percent-sign followed by their two-character hexadecimal UTF-8 byte value.

For example, a space character becomes %20 (or + in form data), an ampersand & becomes %26, and non-ASCII Unicode characters (like emojis or Hindi letters) are converted into their multi-byte hexadecimal sequence (e.g. 🚀 becomes %F0%9F%9A%80).

Space → %20 | & → %26 | ? → %3F | / → %2F

Common uses: Query parameter serialization, OAuth redirects, form submissions, webhook URLs.

How to Use the Base64 & URL Encoder-Decoder

Pick Mode

Choose between Base64 for binary data/tokens, or URL Encoding for web query parameters and links.

Select Direction

Select Encode to transform plain text into safe strings, or Decode to restore encoded strings to text.

Type or Upload

Paste raw text into the input panel, click Sample for a quick test, or click Upload to load a file.

Copy or Swap

Conversion updates live. Click Copy to copy output to clipboard, or click Swap to reverse immediately.

Frequently Asked Questions

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