Zolveroo Tools
Zolveroo Tools — 100% client-side utilities. Nothing you paste or upload ever leaves your device.
Text & Data
JSON Formatter & Validator
Prettify, minify, and validate JSON with inline error locations and a searchable tree view.
Text & Data
Base64 Encoder/Decoder
Encode or decode text and files as Base64, with URL-safe and MIME line-wrap options.
Text & Data
JWT Decoder
Decode a JWT’s header and payload and check its expiration — no signature verification.
Text & Data
Regex Tester
Test regular expressions against sample text with live match highlighting and replace preview.
Text & Data
Text Diff Checker
Compare two blocks of text side-by-side or inline, at line or word/character granularity.
Code & Markup
HTML/CSS/JS Minifier & Beautifier
Minify or beautify HTML, CSS, and JavaScript with a before/after size comparison.
Code & Markup
Markdown Previewer
Live GitHub-flavored Markdown preview with syntax-highlighted code blocks and HTML export.
Code & Markup
SQL Formatter
Format or minify SQL across every dialect the sql-formatter library supports.
Generators
UUID / Hash Generator
Generate UUID v4/v1 in bulk, or hash text and files with MD5, SHA-1, SHA-256, SHA-384, or SHA-512.
Generators
Lorem Ipsum Generator
Generate placeholder words, sentences, or paragraphs as plain text or HTML.
Generators
Password / Passphrase Generator
Generate strong random passwords or EFF wordlist passphrases with a live strength meter.
Generators
QR Code Generator
Create styled QR codes for URLs, Wi-Fi, contact cards, email, SMS, and phone numbers, with custom shapes, colors, and a logo.