Base64 Encoder & Decoder

Encode and decode Base64 string formats, URL-safe variants, Hex data, and binary files with UTF-8 support.

Sample Presets:

Raw Text or Base64 InputBrowse File

0 chars0 lines

1
​
Paste or drop data here
Encode text, Base64, Hex string, or drop a local file.

0 chars0 lines

1
​
Encoded result will appear here
Run Encode or Decode to see the result.

Awaiting input payload (Plain Text, Base64, Hex, or File)

Pure client-side processing in browser memory

Data Encoding & Inspection Pipeline

Encode UTF-8 strings or files, generate Data URIs, and format embedded JSON payloads.

Step 01Active Step

Encode / Decode Base64

Convert binary or UTF-8 strings into Base64 format safely.

Step 02

URL Query Encoding

Encode tokens or parameters for safe HTTP query strings.

Open URL Encoder & Decoder

Step 03

Format Decoded JSON

Pretty-print decoded JSON string payloads with error validation.

Open JSON Formatter & Validator

Developer Documentation & Guidance

Practical developer scenarios, best practices, and common mistakes to avoid.

When Should I Use This Tool?

•Encoding binary data, credentials, or header tokens for safe ASCII transport (RFC 4648).
•Decoding Base64-encoded basic auth headers, API keys, or embedded assets.
•Generating URL-safe Base64 strings for HTTP query parameters or JWT payloads.
•Converting between Hexadecimal representations and Base64 strings.

Developer Best Practices

✓Never treat Base64 as encryption or security protection for confidential data.
✓Use URL-safe Base64 (replacing + with - and / with _) when passing data in URLs.
✓Ensure UTF-8 string encoding when processing multi-byte unicode characters.
✓Use 64-character (PEM) or 76-character (MIME) line wrapping for structured certificates/emails.

Common Developer Mistakes

!Confusing Base64 encoding with cryptographic encryption.
!Using naive btoa/atob that throws errors on UTF-8 / multi-byte characters.
!Padding mismatches (=) when passing standard Base64 in URL query parameters.

Keyboard Shortcuts Help

Encode Base64Ctrl + Enter

Decode Base64Ctrl + Shift + Enter

Copy OutputCtrl + Shift + C

Load PresetsAlt + 1 / 2 / 3 / 4

Related Encoding & Decoding Tools

Utilities belonging to the Encoding & Decoding domain.

URL Encoder & Decoder

Encode and decode URI query parameters, full URLs, form-urlencoded data, and inspect URL components with an interactive query table.

Open

HTML Entity Encoder & Decoder

Encode special characters into Named, Decimal, or Hex HTML entities and decode entities back to plain text with safe sandboxed preview.

Open

Base64 Encoder & Decoder

Encode and decode Base64 string formats, URL-safe variants, Hex data, and binary files with UTF-8 support.

Sample Presets:

Raw Text or Base64 InputBrowse File

0 chars0 lines

1
​
Paste or drop data here
Encode text, Base64, Hex string, or drop a local file.

0 chars0 lines

1
​
Encoded result will appear here
Run Encode or Decode to see the result.

Awaiting input payload (Plain Text, Base64, Hex, or File)

Pure client-side processing in browser memory

Data Encoding & Inspection Pipeline

Encode UTF-8 strings or files, generate Data URIs, and format embedded JSON payloads.

Step 01Active Step

Encode / Decode Base64

Convert binary or UTF-8 strings into Base64 format safely.

Step 02

URL Query Encoding

Encode tokens or parameters for safe HTTP query strings.

Open URL Encoder & Decoder

Step 03

Format Decoded JSON

Pretty-print decoded JSON string payloads with error validation.

Open JSON Formatter & Validator

Developer Documentation & Guidance

Practical developer scenarios, best practices, and common mistakes to avoid.

When Should I Use This Tool?

•Encoding binary data, credentials, or header tokens for safe ASCII transport (RFC 4648).
•Decoding Base64-encoded basic auth headers, API keys, or embedded assets.
•Generating URL-safe Base64 strings for HTTP query parameters or JWT payloads.
•Converting between Hexadecimal representations and Base64 strings.

Developer Best Practices

✓Never treat Base64 as encryption or security protection for confidential data.
✓Use URL-safe Base64 (replacing + with - and / with _) when passing data in URLs.
✓Ensure UTF-8 string encoding when processing multi-byte unicode characters.
✓Use 64-character (PEM) or 76-character (MIME) line wrapping for structured certificates/emails.

Common Developer Mistakes

!Confusing Base64 encoding with cryptographic encryption.
!Using naive btoa/atob that throws errors on UTF-8 / multi-byte characters.
!Padding mismatches (=) when passing standard Base64 in URL query parameters.

Keyboard Shortcuts Help

Encode Base64Ctrl + Enter

Decode Base64Ctrl + Shift + Enter

Copy OutputCtrl + Shift + C

Load PresetsAlt + 1 / 2 / 3 / 4

Related Encoding & Decoding Tools

Utilities belonging to the Encoding & Decoding domain.

URL Encoder & Decoder

Encode and decode URI query parameters, full URLs, form-urlencoded data, and inspect URL components with an interactive query table.

Open

HTML Entity Encoder & Decoder

Encode special characters into Named, Decimal, or Hex HTML entities and decode entities back to plain text with safe sandboxed preview.

Open