// Privacy-First Developer Utilities

Professional Data Tools. Zero Privacy Risk.

CleanVault is a suite of browser-based utilities for developers, marketers, and researchers. Every operation runs 100% locally. Your data never leaves your device — guaranteed by architecture, not just policy.

✓ No Server Uploads ✓ No Logs ✓ Works Offline ✓ Open Source ✓ GDPR Friendly ✓ Free Forever
—
Online Now
—
Days Since Launch
—
Ops Run Today
19
Tools Available
✦ New Tool — April 2026

🔐 Password Strength Checker

Analyse passwords for entropy, crack time & breach exposure — entirely in your browser.

Next tool drops in:
00days
:
00hrs
:
00min
:
00sec
🔮

Coming May 2026 — Hint: something to do with images

We add one brand-new free utility every month. Have something specific in mind?

Get notified when the next tool drops — one email, zero spam.

// Data & Text
🧹
Data
Data Reformatter
Trim, deduplicate, sort lines. Drag & drop CSV or TXT files.
{ }
Convert
CSV → JSON
Transform comma-separated data into structured JSON instantly.
📊
Analyze
Word Counter
Chars, words, sentences, reading time, top keywords & density.
🔤
Encode
Base64
Encode and decode Base64 strings with smart error handling.
🔗
Encode
URL Encoder
Encode/decode URLs. Safe characters, query strings, percent-encode.
🔑
Debug
JWT Debugger
Decode & inspect JSON Web Token header, payload, and signature.
✍️
Convert
Markdown → HTML
Live markdown preview with clean HTML output & raw source view.
Aa
Transform
Text Transformer
Uppercase, Lowercase, Title Case, Sentence Case, Reverse, and more.
🔗
Generate
Slug Generator
Convert titles to SEO-friendly URL slugs with custom separators.
📱
Generate
QR Code
Generate downloadable QR codes for URLs, text, emails, or WiFi.
🎲
Generate
UUID / GUID
Generate v4 UUIDs in bulk. Nil UUID and formatted variants.
#
Generate
Hash Generator
MD5 (simulated), SHA-1, SHA-256, SHA-512 — all computed locally.
🎨
Convert
Color Converter
HEX ↔ RGB ↔ HSL ↔ CMYK with live swatch and palette presets.
🗂
Format
JSON Formatter
Validate, prettify, and minify JSON. Syntax highlighting & error hints.
⚖️
Compare
Text Diff Checker
Compare two blocks of text and highlight added, removed, and changed lines.
🔢
Convert
Number Base Conv.
Convert numbers between Binary, Octal, Decimal, and Hexadecimal.
📝
Generate
Lorem Ipsum Gen.
Generate paragraphs, sentences, or words of placeholder text instantly.
.*
Test
Regex Tester
Test regular expressions live with match highlighting and group capture.
💬
Community
Reviews
Read what users say and share your own experience.
// What Users Are Saying
"As a backend engineer dealing with PII daily, CleanVault is the first tool I've felt comfortable with. I can see in DevTools that zero network requests are made."
Marcus T. — Senior Engineer, Berlin
"The JWT debugger alone saved our team hours. No more copy-pasting tokens into sketchy third-party sites."
Priya S. — Head of CRM, London
"I use the hash generator and UUID tools every sprint. Everything is instant and I know my data stays on my machine."
Dr. Amara O. — Data Analyst, Toronto
🧹 Data Reformatter

Data Reformatter

Clean and normalize raw text data. Supports drag & drop of .txt and .csv files. All processing is local.

⬆ Drop .txt or .csv here, or click to browse
📥 Input0 chars
📤 Output
Output will appear here...
Ready0 chars
// Examples
SMART TRIM
hello , world
↓
hello, world
DEDUPLICATE
apple
banana
apple
↓
apple
banana
SORT LINES
cherry
apple
banana
↓
apple
banana
cherry
{ } CSV → JSON

CSV to JSON Converter

Converts comma-separated values with a header row into structured JSON. Handles quoted fields and whitespace.

📥 CSV Input
📤 JSON Output
JSON will appear here...
Enter CSV data and click Convert
// EXAMPLE
Input CSV:
name,score
Alice,95
Bob,87
→
Output JSON:
[
  {"name":"Alice","score":"95"},
  {"name":"Bob","score":"87"}
]
📊 Word Counter

Word & Character Counter

Detailed text analysis: word count, characters, sentences, reading time, top keywords, and keyword density.

Input Text
0
Words
0
Characters
0
No Spaces
0
Sentences
0
Paragraphs
0 min
Read Time
0 min
Speak Time
Top Keywords
KeywordCountDensityBar
Start typing to see keywords...
Text Insights
Enter text above to generate insights.
🔤 Encode / Decode

Base64 Encoder / Decoder

Encode plain text to Base64 or decode Base64 back to plain text. Invalid input shows a clear error instead of crashing.

📥 Input
📤 Output
Output will appear here...
Choose Encode or Decode below
// EXAMPLE
Plain text:
Hello, CleanVault!
Base64 encoded:
SGVsbG8sIENsZWFuVmF1bHQh
🔗 URL Encoder

URL Encoder / Decoder

Percent-encode special characters for use in URLs, or decode encoded URLs back to readable text.

📥 Input
📤 Output
Output will appear here...
Choose Encode or Decode
Input:
hello world & more!
Encoded (component):
hello%20world%20%26%20more!
🔑 JWT Debugger

JWT Debugger

Decode and inspect JSON Web Tokens. Paste any JWT to see its header, payload, and signature. Never sent to a server.

JWT Token Input
Header
—
Payload
—
Signature
—
Paste a JWT above
✍️ Markdown → HTML

Markdown to HTML Converter

Live markdown preview and clean HTML output. Supports headings, bold, italic, links, tables, blockquotes, and code.

📥 Markdown Input
👁 Preview
Type markdown on the left
Aa Text Transformer

Text Transformer

All case transformations and text operations in one place: Uppercase, Lowercase, Title Case, Sentence Case, Alternating, Reverse, and more.

Input Text

UPPERCASE

Converts all letters to capitals.

hello world
↓
HELLO WORLD

lowercase

Converts all letters to lowercase.

HELLO WORLD
↓
hello world

Title Case

Capitalizes the first letter of each word.

hello world today
↓
Hello World Today

Sentence case

Capitalizes first letter of each sentence.

hello. how are you.
↓
Hello. How are you.

aLtErNaTiNg

Alternates between upper and lowercase.

hello world
↓
hElLo wOrLd

Reverse Text

Reverses every character in the text.

Hello World
↓
dlroW olleH

Remove Numbers

Strips all numeric characters from text.

abc123def456
↓
abcdef

Remove Punctuation

Strips all punctuation marks from text.

Hello, World!
↓
Hello World
📤 Result
Result will appear here...
🔗 Slug Generator

Slug Generator

Convert any title or phrase into a clean, SEO-friendly URL slug. Handles accents, spaces, and special characters.

your-slug-appears-here
Input:
My Blog Post Title! (2025)
Slug output:
my-blog-post-title-2025
📱 QR Code Generator

QR Code Generator

Generate QR codes for URLs, plain text, email addresses, phone numbers, or WiFi credentials. Generated entirely in your browser.

Enter content to generate QR
🎲 UUID / GUID Generator

UUID / GUID Generator

Generate cryptographically random v4 UUIDs in bulk. Also generates Nil UUID. All generated locally using crypto.getRandomValues().

Nil UUID: 00000000-0000-0000-0000-000000000000
Click "Generate UUIDs" to create UUIDs.
# Hash Generator

Hash Generator

Generate cryptographic hashes using the browser's built-in SubtleCrypto API. SHA-1, SHA-256, SHA-384, and SHA-512. All local.

SHA-1—
SHA-256—
SHA-384—
SHA-512—
⚠ Hash functions are one-way. They cannot be reversed. SHA-256 and above are considered cryptographically secure. All hashing uses the browser's native SubtleCrypto API.
🎨 Color Converter

Color Picker & Converter

Convert between HEX, RGB, HSL, and CMYK. Pick a color visually or type any format. All computed locally.

HEX
#3b82f6
RGB
rgb(59, 130, 246)
HSL
hsl(217, 91%, 60%)
CMYK
cmyk(76%, 47%, 0%, 4%)
Preset Palettes
Shades
💬 Community

Reviews & Feedback

Share your experience using CleanVault. Your feedback shapes the tool's future. All reviews are anonymous.

// Submit Your Review
★★★★★
✓ Thank you! Your review has been added.
// What Users Say
🗂 JSON Formatter

JSON Formatter & Validator

Validate, prettify, and minify JSON. Instant error detection with line hints. All local — your JSON never leaves the browser.

📥 JSON Input0 chars
📤 Output
Output will appear here...
Paste JSON and click an action
Minified input example:
{"name":"Alice","scores":[95,87,91],"active":true}
Prettified output:
{
  "name": "Alice",
  "scores": [95, 87, 91],
  "active": true
}
⚖️ Text Diff

Text Diff Checker

Paste two versions of any text to see exactly what changed — line by line. Added lines in green, removed in red.

📄 Original Text (A)
📄 Modified Text (B)
Paste two texts and click Compare
Diff output will appear here...
■ Added lines ■ Removed lines ■ Unchanged lines
🔢 Number Base Converter

Number Base Converter

Instantly convert numbers between Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16).

Additional Info
Enter a number above to see details.
Quick Reference Table
DecimalBinaryOctalHex
📝 Lorem Ipsum

Lorem Ipsum Generator

Generate standard or randomized placeholder text in paragraphs, sentences, or words. Copy-ready output.

Generated Text
Click Generate to create placeholder text...
.* Regex Tester

Regular Expression Tester

Test regex patterns against any text in real-time. See all matches highlighted, capture groups extracted, and replacement output.

/ /
Match Highlights0 matches
Captured Groups
Groups will appear here...
Replaced Output
...
Common Patterns
🛡️ Privacy

Why Data Privacy Matters

An authoritative guide to why browser-based data processing is the safest choice for professionals handling sensitive information.

// The Problem with Cloud Tools

In an era where data breaches make headlines weekly, the tools you use to handle sensitive information matter as much as the data itself. Traditional cloud-based data cleaning tools require you to upload your data to remote servers — introducing significant privacy, compliance, and security risks.

Every time you send data to a third-party server, you surrender control. That server could log your data, share it with advertisers, be subpoenaed by authorities, or suffer a breach. For developers handling PII, marketers working with customer lists, and researchers managing clinical or financial data — these risks are real, frequent, and costly.

CleanVault's architecture is fundamentally different. By executing all transformations directly in your browser's JavaScript engine, your raw data never leaves the device it sits on. There is no transit, no storage, no exposure window.

// Cloud vs Local: Risk Comparison
✕ CLOUD TOOLS
✕Data transmitted to servers
✕Server-side logging possible
✕Third-party data exposure
✕Breach risk during transit
✕Compliance complexity
✕Requires internet connection
✕May sell your usage data
✕Terms can change anytime
✓ CLEANVAULT
✓100% local browser execution
✓Zero server interaction
✓No third-party exposure
✓No transit = no risk
✓GDPR / HIPAA friendly
✓Works completely offline
✓No data sold, ever
✓Open source & auditable
// Regulatory Alignment
GDPR
General Data Protection Regulation. Requires data minimization and processing safeguards. CleanVault satisfies Article 25 (Data Protection by Design) by default.
HIPAA
Health Insurance Portability Act. Prohibits disclosure of PHI. CleanVault's zero-upload architecture ensures health data never crosses organizational boundaries.
CCPA
California Consumer Privacy Act. Grants consumers rights over their data. CleanVault never collects personal data — full compliance is structural, not policy-based.
SOC 2
Security, Availability, Processing Integrity. CleanVault's client-side model eliminates server-side risk vectors entirely — by design.
⚙️ Architecture

How CleanVault Works

A transparent technical explanation of client-side processing — how your data is transformed entirely within your browser without any server involvement.

01
📋
You Enter Data
Data is typed, pasted, or drag-dropped directly into the browser DOM. This action triggers zero HTTP requests — verifiable in DevTools → Network tab.
02
🧠
JS Engine Runs
Pure JavaScript functions execute within V8 (Chrome) or SpiderMonkey (Firefox) — the browser's own sandboxed runtime. No external calls are made.
03
🖥️
Output Renders
Results are written to a DOM element on your screen. No fetch(), no XMLHttpRequest, no WebSocket. Inspect the source code yourself to verify.
04
📎
You Copy & Go
Use the clipboard API to copy your clean data. When you close the tab, your data is completely gone. No persistence. No session storage of your data.
// Verify It Yourself

Open your browser's Developer Tools (F12 → Network tab). Paste any data and run a transformation. You will see zero outbound requests to any external server.

View the page source (Ctrl+U / Cmd+U). Every function that touches your data is plain, unobfuscated JavaScript. There are no hidden scripts, no minified blobs concealing logic.

// Browser APIs Used
SubtleCrypto API
Used by the Hash Generator. Native browser cryptographic functions — no external library needed.
crypto.getRandomValues()
Used by UUID Generator. Cryptographically secure random number generation.
Clipboard API
Used by all Copy buttons. Writes to clipboard without any server round-trip.
FileReader API
Used by drag-and-drop. Reads files directly into browser memory — never uploaded to any server.
Canvas API
Used by QR Code Generator. Renders QR codes as pixel graphics entirely in-browser.
🔒 Security Protocol

Security Guarantees

CleanVault's three foundational security commitments — enforced by architecture, not just policy.

✓ Verified
🛡️
Zero-Upload Architecture
Our codebase contains zero server-side endpoints that accept data input. This is not a policy — it's a structural impossibility. Open DevTools and inspect the Network tab to verify yourself.
✓ Verified
📋
No-Logs Policy
CleanVault does not log keystrokes, input content, output content, or processing metadata. We collect zero telemetry about what data you clean. Analytics, if any, are limited to anonymous page-view counts only.
✓ Verified
🔍
Open & Auditable
Every function that touches your data is written in plain JavaScript and readable via your browser's View Source. There is no obfuscation, no minified blobs hiding logic. Trust, but verify — we welcome it.
// Security Checklist
✓No external API calls during data processing
✓No cookies tied to input or output data
✓No localStorage used for sensitive data
✓No third-party tracking scripts
✓No CDN-loaded code that handles user data
✓No server-side session storage
✓All cryptography via native browser SubtleCrypto
✓QR generation via canvas — data stays local
✓File reading via FileReader — never uploaded
✓Clipboard API write-only — no persistent access
✉️ Contact Us

Get in Touch

Have a question, found a bug, or want to suggest a feature? We'd love to hear from you. Reach us at hello@cleanvault.io — we respond within 2–3 business days.

👋

General Inquiries

Questions about CleanVault, how it works, or how to use a specific tool? We're happy to help with anything.

✉ hello@cleanvault.io
🐛

Bug Reports

Spotted something that doesn't work? Please describe the tool, your input, and the unexpected result in your email.

✉ hello@cleanvault.io
💡

Feature Requests

Have an idea for a new utility or improvement? We prioritize new tools based on community requests — your voice matters.

✉ hello@cleanvault.io
🔒

Privacy & Security

Have a concern about privacy, data handling, or a potential security issue? We take these reports seriously and respond promptly.

✉ hello@cleanvault.io
// What to Include in Your Message
For Bug Reports
  • →Which tool you were using
  • →A sample of your input (anonymized if needed)
  • →What you expected vs. what happened
  • →Your browser and operating system
For Feature Requests
  • →The tool or feature name you'd like
  • →Your use case (how you'd use it)
  • →Whether it involves external data or APIs
  • →Priority level: nice-to-have or critical
⏱
Response Time
We aim to respond to all inquiries within 2–3 business days. For urgent security concerns, expect a response within 24 hours.