Developer Utilities

UtiliStudio Workspace Tool

A unified workbench of daily developer tools. Encode data, inspect JSON Web Tokens, compute cryptographic hashes, test regex patterns, and convert timestamps.

Encode, decode, hash, and inspect tokens directly in your browser

Open Developer UtilitiesRuns directly in your browser

Key Capabilities

Encoding & Decoding Suite

Convert strings to and from Base64, encode and decode URL parameters, and escape HTML entities for secure web delivery.

JWT Inspector & Token Tools

Decode JSON Web Token headers and payloads, inspect signature claims, and check expiration timestamps with formatted JSON display.

Cryptographic Hash Generation

Calculate MD5, SHA-1, SHA-256, and SHA-512 message digests for strings and verification checksums.

Formatting, Regex & Time Helpers

Test regular expressions with real-time match groups, convert Unix epoch timestamps to UTC/local time, and transform identifier case styles.

How to Use Developer Utilities

Select desired utility

Choose from Base64, URL Encode, JWT, Hash, Timestamp, Regex, Case Converter, Color Converter, or Password Generator.

Enter or paste input

Type or paste your token, string, pattern, or timestamp into the dedicated input pane.

Adjust settings or algorithm

Select preferred hash functions, regex flags, timestamp formats, or target case styling.

Inspect output & copy

View the processed output or parsed JSON payload and copy the result directly to your clipboard.

Practical Examples

Decoding a JSON Web Token (JWT)

A compact three-part JWT token is decoded into readable header and claims payloads with expiration verification.

Input (Raw / Unformatted)

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkFsZXgiLCJpYXQiOjE1MTYyMzkwMjJ9.4z...

Output (Formatted & Indented)

Header:
{
  "alg": "HS256",
  "typ": "JWT"
}

Payload:
{
  "sub": "1234567890",
  "name": "Alex",
  "iat": 1516239022
}

Common Use Cases

Inspecting Auth & API Tokens

Inspect claims, roles, scopes, and expiration timestamps inside OAuth and OpenID Connect tokens during authentication debugging.

URL & Payload Encoding

Safely encode query string parameters, redirect targets, and API callback payloads for network requests.

Verifying Integrity Checksums

Calculate SHA-256 and MD5 checksums to verify payload hashes and compare file verification signatures.

Translating Epoch Timestamps

Convert raw Unix seconds and millisecond timestamps from database logs into ISO 8601 and localized date strings.

Frequently Asked Questions

Which cryptographic hash functions are available?

You can compute MD5, SHA-1, SHA-256, and SHA-512 hashes directly in your browser using standard algorithms.

Can I decode expired or malformed JWT tokens?

Yes. The JWT inspector decodes and formats the header and payload segments of any structurally valid Base64URL token, enabling you to inspect claims even if timestamps have expired.