This page provides a secure, browser-based suite of developer utilities (JSON, API, RegEx, Crypto) that allows you to format, validate, and test code locally on your device, ensuring your API keys, tokens, and logic never leave your computer.

Developer Tools

A specialized toolkit for modern developers. From JSON formatting and RegEx testing to security utilities like JWT debugging and chmod calculation, we've built the essential utilities you use every day—optimized for local security.

JSON Compare

Compare two JSON objects and highlight differences.

JSON Prettier

Format and validate raw JSON data.

Text Comparison

Compare two texts and highlight differences.

RegEx Tester

Test and visualize regular expressions.

Code Minifier

Minify JS, CSS, HTML and SQL code.

Base64 Converter

Encode and decode text or images.

JSON to Interface

Convert JSON objects to TypeScript interfaces.

Code Formatter

Beautify SQL, HTML, CSS code.

YAML ↔ JSON

Convert between YAML and JSON.

Markdown Editor

Write markdown with live preview.

Cron Parser

Explain cron expressions in English.

Curl to Fetch

Convert Curl commands to JS Fetch.

Epoch Converter

Convert Unix timestamps to dates.

Unit Converter

Convert data storage units (KB, MB).

Chmod Calculator

Visual Unix permission generator.

Password Generator

Create strong, random passwords.

Hash Generator

Generate MD5, SHA-1, SHA-256 hashes.

Encryption Tool

Encrypt messages with AES security.

JWT Debugger

Decode and inspect JWT tokens.

HMAC Generator

Create keyed-hash message codes.

UUID Generator

Generate random UUIDs (v4).

URL Encoder

Encode/Decode URL strings.

HTML Entity Encoder

Convert characters to HTML entities.

QR Code Generator

Create QR codes from text/URL.

Device Info

View IP, UA, and Screen info.

Why We Built This Collection

Development is a flow state. But nothing breaks that flow like needing to format a massive JSON blob or decode a JWT, and having to resort to a sketchy, ad-filled website. Worse, many of these "free" tools send your data to their servers for processing. For a developer, pasting a production database credential or a customer's PII into a random text box is a security nightmare. The "Privacy Paradox" here is real: you need the tool to do your job, but using it risks your job. PrivaQuickTools Developer Tools solves this by running 100% client-side. When you paste your JSON, Regex, or JWT, the processing logic runs in your browser's JavaScript engine. We don't see your code. We don't store your tokens. You get the utility of a web tool with the security of a local script.

I once pasted a client's API key into a 'free JSON formatter' to debug a response. Five seconds later, I realized what I'd done and spent the next hour rotating every key in production. I built this suite so I could never feel that panic again.

Key Capabilities

Core features that make these tools powerful.

Zero Leaks: Paste passwords and keys safely; they never leave your RAM.

Offline Ready: Debug code on a plane or during an internet outage.

Instant Feedback: No server round-trips; validation happens as you type.

Universal Support: Works with standard formats (JSON, JWT, Base64).

How It Works

Understanding the processing logic.

Our developer suite covers the entire stack: - **Data Formatting:** Prettify and validate JSON, XML, and YAML. - **Security Tools:** Decode JWTs to inspect claims, generate hash digests (MD5, SHA-256), and calculate file permissions (multimode chmod). - **Web Utilities:** Encode/Decode URL strings, Base64 assets, and HTML entities. - **Testing:** Test Regular Expressions against sample text with real-time matching. All tools use your browser's native APIs (like the Crypto API for hashing) or standard, open-source libraries (like Prettier) compiled for the web.

Accuracy & Reliability

We rely on standard, battle-tested libraries (e.g., standard JSON parsers, PCRE regex engines) to ensure 100% compliant behavior. Hashing uses the browser's implementation of SHA/MD5 standards, ensuring bit-perfect results.

Who Is This For?

Backend Engineers

Debug API responses and validate JWT claims without risking key exposure.

Frontend Developers

Format messy JSON from API logs and test regex patterns for form validation.

DevOps / Sysadmins

Calculate Chmod permissions and generate secure password hashes.

Security Researchers

Analyze encoded strings and payloads in a contained, offline environment.

How to Use

Select Utility

Choose the specific tool you need (e.g., 'JSON Formatter') from the grid.

Paste Input

Paste your code, text, or string into the input editor. Processing starts instantly.

Configure

Adjust settings like indentation size (spaces vs tabs) or hashing algorithm.

Copy Output

Click the 'Copy' button to grab the formatted or processed result.

Common Mysteries & Fixes

Large Files

Pasting a 50MB JSON log file into a browser text area perfectly might cause the tab to freeze temporarily.

Invalid Syntax

Tools like JSON Formatter are strict; a single missing comma will prevent formatting. Look for the error line indicator.

Regex Flavors

Ensure you are testing for the JavaScript regex flavor. Python or PCRE specific groups might behave differently.

Secret Hygiene

Even though we are secure, always clear your clipboard after copying sensitive keys.

Real-World Scenarios

API Debugging

Turn a minified, unreadable API response into a structured, readable JSON tree.

Auth Testing

Verify if a JWT token has expired or contains the correct user roles.

Data Migration

Convert YAML configuration files to JSON for a new system import.

Log Analysis

Extract specific error codes from a text dump using the Regex tester.

Why Choose PrivaQuickTools

Feature	PrivaQuickTools	Others
Privacy	100% Client-Side	Server-Side (Risky)
Latency	0ms (Instant)	Network Dependent
Data Retention	Session Memory Only	Often Logged
Offline Use	Supported	Impossible

Privacy & Security Guaranteed

Your security is our priority. All processing happens locally in your browser. We never upload your files to our servers, ensuring your sensitive data remains completely private and secure on your device.

Benefits

SecurityEliminates the risk of third-party logging of your sensitive data.
SpeedZero network latency means instant formatting and validation.
ReliabilityWorks perfectly without an internet connection.
CleanlinessNo ads, no popups, just the raw utility you need.

When Not To Use

While we aim for perfection, browser-based tools have limits. PrivaQuickTools might not be the best fit for:

Extremely large files (e.g., video over 2GB)
Batch processing thousands of files at once
Workflows requiring server-side collaboration or cloud storage

Frequently Asked Questions

Common questions about our developer tools.

Yes. Unlike jwt.io and others that may run server-side or use analytics, our decoding happens entirely in your browser memory. Your secret keys and tokens are never transmitted over the network.

Yes. It uses the standard JSON.parse() method. If your JSON is invalid, it will throw a descriptive error telling you exactly where the syntax issue is.

You can generate hashes (like SHA-256) for verification. However, for storing passwords in a real app, you should always salt and hash on your server, not in a client-side tool.

No. We have no database for user input. Your code exists only in your RAM and disappears the moment you close the tab.

Check your flags (global, case-insensitive). Also, ensure you are writing valid JavaScript RegExp syntax, as that is the engine running the test.

Yes. PrivaQuickTools is a Progressive Web App (PWA). Once loaded, you can turn off your Wi-Fi and keep formatting and testing code.

The only limit is your browser's memory. You can generally handle text blobs up to 10-50MB without issues, but larger files may slow down the UI.

Yes, we offer converters for various data structures including XML, YAML, and CSV to JSON.

We use open-source, standard implementations (like Prettier for formatting) to ensure that tool behavior matches your local dev environment.

Yes! We love suggestions. Use our contact form to request a specific utility you find missing from your workflow.