Tool Cluster

6 local tools

Encoding Tools

Choose local tools for Base64 text, URL components, query strings, HTML entities, token payloads, and small image data URIs.

Local-onlyNo uploadTask chooser

Which tool should I use?

NeedUseInputNotes
Encode or decode short textBase64 Encode/DecodeTextUse Image to Base64 for files.
Decode URL parametersURL Query ParserURL or queryPreserves duplicate keys.
Escape HTML snippetsHTML Entity Escape/UnescapeTextEscaping is not sanitizing.
Preview image data URIImage to Base64 ConverterImage fileFileReader only, size-limited.

Encoding tool entries

Base64 Encode/DecodeEncode Unicode text to Base64 or decode Base64 back to text locally.HTML Entity Escape/UnescapeEscape common HTML characters or unescape named and numeric entities.Image to Base64 ConverterConvert image files to Base64 data URIs locally with FileReader and preview pasted data URIs.JWT DecoderDecode JWT header and payload locally, with optional HS256, HS384, and HS512 signature matching when you provide a secret.URL Encode/DecodeEncode URL components and decode percent-encoded text without sending it anywhere.URL Query ParserParse full URLs or query strings into decoded rows and JSON without fetching the URL.

Practical examples

Same text, different encoding

A space becomes %20 in URL encoding, SGVsbG8= in Base64, and stays readable after HTML entity escaping unless markup characters appear.

URLBase64HTML Entity

Token inspection flow

Decode the JWT payload, then format the JSON or convert any timestamp claims.

JWTJSONTimestamp

Workflow notes

Pick the format first

Base64 is reversible text encoding, URL encoding protects URL components, and HTML entities make markup display as text.

Base64URLHTML Entity

Keep files local

Image Base64 uses FileReader and blocks oversized images before reading.

Image Base64

Adjacent categories

Developer tools

Format JSON, inspect IDs, compare payloads, and generate hashes.

Text tools

Clean copy, count characters, and convert case locally.

FAQ

Is encoding the same as encryption?

No. These tools transform representation and do not make data secret.

Do encoding tools fetch pasted URLs?

No. URL tools parse or transform text locally without network requests.