What is the difference between encoding and encryption?

Encoding transforms data into a standard public format for compatibility, requiring no key to decode. Encryption transforms data into unreadable ciphertext to ensure secrecy, requiring a secret key to decrypt.

How does Base64 encoding work?

Base64 converts 3 bytes of binary data (24 bits) into 4 printable ASCII characters by mapping 6-bit chunks to a 64-character index table.

Why is URL encoding necessary?

URLs can only contain a limited set of unreserved ASCII characters. Characters like spaces, question marks, and ampersands have special structural meaning and must be percent-encoded to avoid syntax ambiguity.

What are HTML entities?

HTML entities are special code sequences (like `<` for `<`) used by web browsers to display characters that would otherwise be parsed as HTML markup tags.

A Data URI allows inline embedding of small files (like images or fonts) directly into HTML or CSS using the format `data:[mediatype];base64,[data]`.

Does Base64 encoding increase file size?

Yes, Base64 encoding increases file size by approximately 33% because 3 raw bytes expand into 4 ASCII characters.

What is URL-safe Base64?

URL-safe Base64 (Base64URL) replaces `+` with `-` and `/` with `_`, and omits trailing `=` padding characters so the string can be safely used in web addresses without percent-encoding.

Are my inputs sent to your server when encoding or decoding?

No. All conversion algorithms run completely in your client browser memory using local JavaScript APIs.

Can I encode binary files like images or PDFs?

Yes. You can drag and drop any file into the tool to generate Base64 strings or decode Base64 back into downloadable binary files.

What is GZIP compression encoding?

GZIP compression compresses text input using Deflate algorithm before Base64 encoding, drastically reducing payload size for large JSON or XML strings.

Why does Base64 output end with equals signs (=)?

The `=` sign is padding used when the input byte length is not divisible by 3, ensuring the output string aligns to 4-character blocks.

What happens if I try to decode invalid Base64 input?

The tool detects invalid characters or bad block lengths and displays an intuitive error message explaining the issue.

What is Hex encoding?

Hex (hexadecimal) encoding represents each byte of input data as two 4-bit hexadecimal digits from `00` to `FF`.

How do I decode Basic Authentication headers?

Basic Auth headers take the format `Basic [base64_string]`. Paste the Base64 portion into the decoder to reveal the `username:password` string.

Is this encoder decoder tool free with no limits?

Yes, ScanSuite provides unlimited free encoding and decoding without registration or rate caps.

Can I convert between Hex and Base64 directly?

Yes. Switch your selected format to Hex or Base64 to convert binary byte representations instantly.

What is Unicode UTF-8 encoding support?

Our tool natively supports full multi-byte UTF-8 string encoding, handling emojis, international alphabets, and special symbols correctly.

Which format should I use to sanitize user input in HTML?

Use HTML Entity encoding to escape ` ` characters before inserting user text into HTML templates.

Free Online Base64, URL, HTML Encoder Decoder

Q: What is a Data URI?

A Data URI allows inline embedding of small files (like images or fonts) directly into HTML or CSS using the format `data:[mediatype];base64,[data]`.

Q: Does Base64 encoding increase file size?

Yes, Base64 encoding increases file size by approximately 33% because 3 raw bytes expand into 4 ASCII characters.

Q: What is URL-safe Base64?

URL-safe Base64 (Base64URL) replaces `+` with `-` and `/` with `_`, and omits trailing `=` padding characters so the string can be safely used in web addresses without percent-encoding.

Q: Are my inputs sent to your server when encoding or decoding?

No. All conversion algorithms run completely in your client browser memory using local JavaScript APIs.

Q: Can I encode binary files like images or PDFs?

Yes. You can drag and drop any file into the tool to generate Base64 strings or decode Base64 back into downloadable binary files.

Q: What is GZIP compression encoding?

GZIP compression compresses text input using Deflate algorithm before Base64 encoding, drastically reducing payload size for large JSON or XML strings.

An online encoder decoder transforms data between plain text or binary formats and standardized representation schemes — such as Base64, URL percent-encoding, HTML entities, or Hex — enabling safe data transmission over text-based network protocols, APIs, and web rendering pipelines.

Select your encoding format (Base64, URL, HTML, Hex, Binary, Octal, or GZIP), choose Encode or Decode mode, and type or paste your input. ScanSuite converts your data in real time with bidirectional mode switching, drag-and-drop file support, and instant output copy buttons.

Data encoding transforms raw text or binary data into specialized character sets to ensure compatibility with network protocols, web browsers, databases, and serialization formats. Decoding reverses the transformation to restore the original unencoded data.

ScanSuite's free multi-format encoder decoder supports Base64, URL percent-encoding, HTML entity escaping, Hexadecimal, Octal, Binary representations, and GZIP compression directly in your browser. With instant bidirectional conversion and client-side execution, you can debug payloads and prepare data safely without server hops.

ScanSuite's free online encoder decoder converts text and files across Base64, URL percent-encoding, HTML entities, Hex, Binary, Octal, and GZIP compression. With instant bidirectional mode switching and local client-side processing, developers can debug payloads and prepare data effortlessly.

Frequently Asked Questions

What is the difference between encoding and encryption?: Encoding transforms data into a standard public format for compatibility, requiring no key to decode. Encryption transforms data into unreadable ciphertext to ensure secrecy, requiring a secret key to decrypt.
How does Base64 encoding work?: Base64 converts 3 bytes of binary data (24 bits) into 4 printable ASCII characters by mapping 6-bit chunks to a 64-character index table.
Why is URL encoding necessary?: URLs can only contain a limited set of unreserved ASCII characters. Characters like spaces, question marks, and ampersands have special structural meaning and must be percent-encoded to avoid syntax ambiguity.
What are HTML entities?: HTML entities are special code sequences (like `<` for `<`) used by web browsers to display characters that would otherwise be parsed as HTML markup tags.
What is a Data URI?: A Data URI allows inline embedding of small files (like images or fonts) directly into HTML or CSS using the format `data:[mediatype];base64,[data]`.
Does Base64 encoding increase file size?: Yes, Base64 encoding increases file size by approximately 33% because 3 raw bytes expand into 4 ASCII characters.