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Local Tools

Common browser-local utilities for word count, RMB uppercase, regex testing, JSON, Base64, MD5, timestamps, colors, and encoding conversion.

Word Count

Count characters, words, punctuation, lines, and paragraphs in real time.

Total characters

Characters (no spaces)

Chinese characters

English words

Numbers

Punctuation / Symbols

Lines

Paragraphs

RMB Uppercase

Convert numeric amounts into formal Chinese RMB uppercase text.

Regex Tester

Test regular expressions with common flags and preview matches instantly.

gimsu

Matched 2 occurrence(s)

hello@itianci.cnadmin@example.com

Color Tool / Gradient

Convert HEX, RGB, and HSL, check contrast, and generate CSS gradients.

Color conversion

HEX

#5b3df5

RGB

rgb(91, 61, 245)

HSL

hsl(250, 90%, 60%)

Contrast check (WCAG)

Example Text AaContrast 2.93:1

AA Text ✗AA Large Text ✗AAA Text ✗

CSS gradient generator

deg

background: linear-gradient(135deg, #5b3df5, #b79bff);

JSON <-> CSV

Convert JSON arrays and CSV tables for import, export, and data cleanup.

JWT Decode

Decode JWT headers and payloads, with issued and expiry times shown clearly.

Cron Parser

Parse standard five-field cron expressions and preview upcoming runs.

Field order: minute (0-59), hour (0-23), day (1-31), month (1-12), weekday (0-6, 0=Sunday)

Next 5 run times

· 6/11/2026, 09:00:00
· 6/12/2026, 09:00:00
· 6/15/2026, 09:00:00
· 6/16/2026, 09:00:00
· 6/17/2026, 09:00:00

SHA Hash

Compute SHA-1, SHA-256, SHA-384, and SHA-512 locally with Web Crypto.

Base Conversion

Convert binary, octal, decimal, hex, and bases from 2 to 36 using BigInt.

Binary (2)

11111111

Octal (8)

377

Decimal (10)

255

Hexadecimal (16)

Text Diff

Compare two text blocks line by line and highlight added or removed lines.

Case Conversion

Convert between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and Title Case.

camelCase

helloWorldExample

PascalCase

HelloWorldExample

snake_case

hello_world_example

kebab-case

hello-world-example

CONSTANT_CASE

HELLO_WORLD_EXAMPLE

Title Case

Hello World Example

AES Encrypt / Decrypt

Encrypt and decrypt with AES-GCM locally in the browser.

Base64 Encode / Decode

Safely encode and decode Unicode text for API and parameter testing.

MD5 Calculate / Verify

Calculate MD5 and compare it with an expected hash.

Random Number / String

Generate random test values with configurable character sets.

Uppercase lettersLowercase lettersNumbersSymbols

Timestamp Converter

Convert seconds, milliseconds, and date strings to local time and ISO output.

JSON Format / Minify

Format JSON for reading or minify it into one line for configs and requests.

Code Obfuscate / Minify

Minify JavaScript, CSS, or HTML, and obfuscate JavaScript when needed.

Strength can be adjusted after selecting "Obfuscate + Minify".

Parameter Analyzer

Parse URL query strings, form-like parameters, or JSON key-value data.

Sensitive Word Check

Run a quick first-pass scan with a lightweight built-in word list.

No matches in the built-in list.

Most tools here run locally in your browser and do not upload your content; the few that require network access only read public information. For security reasons, network tools do not support queryinglocalhostand other intranet addresses. Feel free to bookmark this page to keep these utilities handy.

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