ZechKit is an all-in-one offline utility toolkit featuring 100+ native calculators, unit converters, PDF editor tools, QR & barcode scanner/generator, CSV spreadsheet & SQLite database manager, developer utilities, and security tools.

Replaces dozens of single-purpose apps with one lightweight, privacy-first toolkit. 100% offline—no accounts, no subscriptions, zero data tracking. Everything runs locally on your device.

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🌟 ALL 14 TOOL CATEGORIES
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1. 🧮 100+ SMART CALCULATORS
• Finance: Loan EMI, Mortgage, Compound Interest, Auto Loan, Simple Interest, ROI, Margin & Markup.
• Taxes & Business: Sales Tax, VAT/GST, Tip & Bill Splitter, Discount & Percentage.
• Health & Fitness: BMI, BMR, Body Fat %, Daily Calorie & TDEE, Ideal Weight.
• Date & Math: Age Calculator, Date Difference, Leap Year, Work Hours, Fractions.

2. 📐 UNIT CONVERTERS
• 20+ Categories: Length (m, km, mi, ft), Weight (kg, lb, oz), Temp (C, F), Volume (l, gal), Area, Speed, Pressure, Power, Energy, Fuel (MPG) & Storage (MB, GB, TB).
• Custom Pairs: Save custom conversion shortcuts for 1-tap access.

3. 📄 OFFLINE PDF TOOLS
• Merge & Split: Combine multiple PDFs or extract page ranges.
• Compress PDF: Shrink file size with multi-tier compression.
• Convert: High-res PDF to JPG/PNG & Images to PDF booklet.
• Edit: Reorder, rotate 90°/180°/270°, and sign PDFs.

4. 📱 QR & BARCODE STUDIO
• QR Generator: Custom QR for URLs, Wi-Fi, vCards, SMS & Events with styles.
• Dual Scanner: Live camera scan & 100% offline photo QR decoder.
• Barcodes: Generate & scan 1D barcodes (EAN-13, UPC-A, Code 128, Code 39).

5. 📊 DATA & SPREADSHEETS
• CSV Editor: In-place cell editing with sticky toolbar, undo/redo & row CRUD.
• Converter: Batch convert CSV, Excel (XLSX), JSON, and TSV.
• Manager: Split datasets with pagination & merge CSV files.
• SQLite: Inspect schemas, run SQL queries, view data grids & export .db.

6. 💻 DEVELOPER TOOLS
• JSON Studio: Formatter, Validator & Minifier with syntax trees.
• Encoders: Base64, URL Encoder/Decoder, HTML Entity Encoder.
• Code Tools: JWT Inspector, RegEx Tester, Markdown Preview & UUID.

7. 🔒 SECURITY & CRYPTO
• Passwords: Strong password generator & brute-force analyzer.
• Crypto: Instant MD5, SHA-1, SHA-256, SHA-512 hashes & Secret Sharing.

8. ✍️ TEXT UTILITIES
• Analysis: Word, character, sentence & reading time counter.
• Tools: Case Converter (UPPER, lower, Title, camel, snake), line sorter, diff.

9. 🖼️ IMAGE TOOLS
• Compress & Resize: Offline photo compressor, resizer & crop.
• Conversion: Convert JPG, PNG, WebP & inspect EXIF metadata.

10. 🎵 AUDIO TOOLS
• Trimmer: Trim ringtones & cut audio with waveform preview.
• Recorder: Offline voice memo recorder & microphone tester.

11. 🎨 COLOR TOOLS
• Color Picker: Real-time HEX, RGB, HSL, HSV, CMYK conversions.
• Accessibility: WCAG Contrast Checker & Color Blindness Simulator.
• Palettes: Palette extractor & harmonious gradient maker.

12. 🌐 WEB TOOLS
• URL Inspector: Parameter parser & UTM Campaign Link Builder.
• Diagnostics: User Agent inspector and screen DPI diagnostics.

13. 🔍 SEO TOOLS
• Generators: Meta tags (title, description, canonicals) & Robots.txt.
• Site Helpers: XML Sitemap builder & Open Graph card previewer.

14. 📢 SOCIAL MEDIA TOOLS
• Limits: Character counters for X/Twitter, Instagram, LinkedIn, TikTok.
• Helpers: Caption cleaner, hook analyzer & hashtag extractor.

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🚀 WHY USERS CHOOSE ZECHKIT
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✔ 100% Offline: Calculate, edit PDFs & query databases anywhere.
✔ Zero Tracking: Your files never leave your device. 100% private.
✔ Fast & Fluid: Lightweight React Native with 60fps animations.
✔ Dark & Light Mode: High-contrast themes for battery savings.
✔ Favorites & History: Star favorite tools & resume recents in 1 tap.

Download ZechKit today—your all-in-one pocket utility toolkit!