DevUtilityHub

Free online developer tools to boost your productivity. Test regex patterns, generate cron expressions, compare JSON objects, encode Base64, and streamline your development workflow.

Browse Developer Tools

Current Tools

Cron Generator

Generate, validate, and visualize cron expressions with human-readable descriptions and next run times.

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Regex Tester

Test and debug regular expressions with real-time matching, highlighting, and capture groups.

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JSON Diff

Compare and visualize differences between JSON objects with syntax highlighting and detailed change tracking.

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Base64 Encoder

Encode and decode Base64 strings, images, and files with support for URL-safe encoding and data URIs.

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Popular Cron Expressions

Quick access to commonly used cron schedules with detailed explanations and examples.

*/5 * * * *

Every 5 Minutes →

*/15 * * * *

Every 15 Minutes →

*/30 * * * *

Every 30 Minutes →

0 * * * *

Every Hour →

0 */2 * * *

Every 2 Hours →

0 0 * * *

Daily at Midnight →

0 12 * * *

Daily at Noon →

0 0 * * 1

Every Monday →

0 0 * * 1-5

Every Weekday →

Popular Regex Patterns

Commonly used regular expressions for validation and text matching.

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9....

Email Address →

^\(?([0-9]{3})\)?[-. ]?([0-9]{...

US Phone Number →

^https?:\/\/(www\.)?[-a-zA-Z0-...

URL/Web Address →

^(?:(?:25[0-5]|2[0-4][0-9]|[01...

IPv4 Address →

^\d{4}-(?:0[1-9]|1[0-2])-(?:0[...

Date (YYYY-MM-DD) →

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d...

Strong Password →

^[a-zA-Z0-9_-]{3,16}$

Username →

^#?([a-fA-F0-9]{6}|[a-fA-F0-9]...

Hex Color Code →

^\d{5}(-\d{4})?$

US ZIP Code →

^(?:4[0-9]{12}(?:[0-9]{3})?|5[...

Credit Card Number →

^\d{3}-\d{2}-\d{4}$

Social Security Number →

^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}...

UUID/GUID →

^[a-z0-9]+(?:-[a-z0-9]+)*$

URL Slug →

^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]...

Domain Name →

\.[a-zA-Z0-9]+$

File Extension →

Popular JSON Diff Use Cases

Common scenarios for comparing and diffing JSON objects with detailed examples.

Compare API Responses →

Compare and diff API response JSON objects

Diff Configuration Files →

Compare JSON configuration files and detect changes

Compare Nested Objects →

Deep comparison of nested JSON objects and structures

Compare JSON Arrays →

Compare and diff JSON arrays with detailed change tracking

Merge JSON Objects →

Merge and combine JSON objects with conflict detection

Popular Base64 Use Cases

Common Base64 encoding and decoding scenarios for text, images, files, and data URIs.

Encode

Base64 Encode

Convert text to Base64 encoded string

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Decode

Base64 Decode

Decode Base64 string back to original text

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Encode

Image to Base64

Convert images to Base64 encoded strings

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Decode

Base64 to Image

Convert Base64 strings back to viewable images

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Decode

Base64 to JSON

Decode Base64 encoded JSON data

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Encode

JSON to Base64

Encode JSON objects to Base64 strings

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Decode

Base64 to Text

Decode Base64 string to plain text

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Encode

Text to Base64

Encode plain text to Base64 string

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Encode

Base64URL Encoder

Encode text using URL-safe Base64 encoding

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Encode

File to Base64

Convert any file to Base64 encoded string

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Encode

PDF to Base64

Convert PDF files to Base64 encoded strings

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Encode

Base64 Data URI Generator

Generate data URIs from Base64 encoded content

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