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SYVTools v1.0
46 Fast, Privacy-First Web Utilities

Everyday Tools. Made Simple.

Fast, private, mobile-friendly everyday utilities for developers, designers, and creators. No accounts, no paywalls, zero telemetry.

All Utilities

Showing 46 tools

DEV-01Working

JSON Formatter & Validator

Prettify, minify, sort keys, and validate JSON with line-by-line syntax error diagnostics.

Device-Only Open →
DEV-02Working

JWT Decoder

Decode JSON Web Token headers and claims with expiry dates without sending tokens anywhere.

Device-Only Open →
DEV-03Working

Regex Tester

Test regular expressions with real-time match highlighting, capture groups, and ReDoS protection.

Device-Only Open →
DEV-04Working

Base64 Encoder / Decoder

Encode and decode text and files to standard Base64 and URL-safe Base64 with full UTF-8 support.

Device-Only Open →
DEV-05Working

UUID Generator

Generate cryptographically secure RFC-4122 v4 UUID identifiers with custom formatting options.

Device-Only Open →
DEV-06Working

Unix Timestamp Converter

Convert epoch seconds and milliseconds to UTC, local, and IST dates and relative time.

Device-Only Open →
DEV-07Working

Code Beautifier

Format and beautify HTML, CSS, JavaScript, and SQL source code locally.

Device-Only Open →
DEV-08Working

Text Diff Checker

Compare two text snippets side-by-side or inline to highlight additions, deletions, and edits.

Device-Only Open →
DEV-09Working

Cron Expression Generator

Build standard 5-field Unix cron schedules with human-readable descriptions and next run times.

Device-Only Open →
DEV-10Working

JSON to CSV Converter

Convert JSON arrays to spreadsheet-safe CSV and parse CSV tables back to JSON.

Device-Only Open →
DEV-11Working

Hash Generator

Generate secure SHA-256 and SHA-512 cryptographic digests using the native Web Crypto API.

Device-Only Open →
DEV-12Working

cURL Converter

Parse cURL commands into clean JavaScript Fetch or Axios requests without running code.

Device-Only Open →
IMG-01Working

Image Compressor

Reduce JPEG, PNG, and WebP file sizes in browser workers while preserving visual fidelity.

Device-Only Open →
IMG-02Working

Image Converter

Convert photos between JPG, PNG, WebP, and AVIF formats entirely on your device.

Device-Only Open →
IMG-03Working

Image Resizer

Resize and crop pictures to exact pixel dimensions with aspect ratio locking.

Device-Only Open →
IMG-04Working

Background Remover

Extract subjects and make photo backgrounds transparent using on-device neural processing.

Network Open →
IMG-05Working

Image to PDF

Combine multiple photos into a single clean PDF document with custom margins and page sizes.

Device-Only Open →
IMG-06Working

Image Watermark

Add text or logo watermarks to your pictures with adjustable opacity and position.

Device-Only Open →
IMG-07Working

Image Color Picker

Sample exact HEX, RGB, and HSL colors from any uploaded image with pixel-level precision.

Device-Only Open →
IMG-08Working

Favicon Generator

Generate multi-resolution PNG and ICO web app icons and HTML manifest tags from a logo.

Device-Only Open →
SEO-01Working

Website Speed Tester

Analyze public Core Web Vitals and Lighthouse performance metrics via Google PageSpeed Insights.

Network Open →
SEO-02Working

Meta Tag Generator

Craft social Open Graph, Twitter card, and search-optimized HTML meta tag snippets.

Device-Only Open →
SEO-03Working

Open Graph Preview

Preview how any web page appears when shared across Twitter, Facebook, and LinkedIn.

Network Open →
SEO-04Working

Robots.txt Generator

Generate search crawler directives and sitemap declarations for web robots.

Device-Only Open →
SEO-05Working

Sitemap Generator

Build XML sitemap files from URL lists with proper entity escaping and lastmod tags.

Device-Only Open →
SEO-06Working

Schema Markup Generator

Generate JSON-LD structured data for Organizations, Persons, Articles, and Products.

Device-Only Open →
SEO-07Working

Broken Link Checker

Crawl public websites within bounded limits to detect dead links and 404 errors.

Network Open →
SEO-08Working

SSL Certificate Checker

Inspect public TLS/HTTPS certificates, expiration dates, and SAN subject names.

Network Open →
SEO-09Working

HTTP Headers Analyzer

Analyze response headers, security flags (HSTS, CSP), and redirect chains for public URLs.

Network Open →
SEO-10Working

CORS Tester

Inspect CORS headers and preflight configuration on public API endpoints.

Network Open →
CAL-01Working

GST Calculator

Calculate inclusive and exclusive India GST with CGST, SGST, and IGST breakdowns.

Device-Only Open →
CAL-02Working

EMI Calculator

Compute monthly loan payments, total interest, and reducing balance amortization schedules.

Device-Only Open →
CAL-03Working

SIP Calculator

Forecast wealth accumulation and compounding returns from monthly systematic investments.

Device-Only Open →
CAL-04Working

Salary Calculator

Estimate monthly take-home salary from annual CTC under Indian tax regimes.

Device-Only Open →
CAL-05Working

Percentage Calculator

Solve everyday percentage calculations, percentage increases, and proportion formulas.

Device-Only Open →
CAL-06Working

Discount Calculator

Calculate shopping savings, sale prices, and multiple successive discount percentages.

Device-Only Open →
CAL-07Working

Date Difference Calculator

Calculate exact days, working days, and calendar components between two dates.

Device-Only Open →
CAL-08Working

Unit Converter

Convert lengths, masses, temperatures, speeds, and data storage units accurately.

Device-Only Open →
CAL-09Working

Currency Converter

Convert world currencies using timestamped official exchange rates.

Network Open →
CAL-10Working

Scientific Calculator

Perform mathematical, trigonometric, and logarithmic calculations safely.

Device-Only Open →
SEC-01Working

QR Code Generator

Create downloadable PNG and SVG QR codes for URLs, text, contact cards, and emails.

Device-Only Open →
SEC-02Working

QR Code Scanner

Scan QR codes instantly from your webcam or uploaded image files securely in-browser.

Device-Only Open →
SEC-03Working

Wi-Fi QR Generator

Generate scannable QR codes for guests to connect to Wi-Fi without typing passwords.

Device-Only Open →
SEC-04Working

Password Generator

Generate cryptographically random passwords with custom lengths and character sets.

Device-Only Open →
SEC-05Working

Password Strength Checker

Evaluate password entropy, crack times, and pattern vulnerabilities locally in your browser.

Device-Only Open →
SEC-06Working

Image Metadata Remover

Strip sensitive GPS locations and EXIF tags from photos before sharing online.

Device-Only Open →
Privacy by Architecture

Zero Server Uploads for Sensitive Data

Your JWT tokens, passwords, JSON documents, and images are processed 100% locally on your machine using browser Web APIs and Web Workers. We never log or transmit your private credentials.