Complete Web Tools Directory
Every utility on AshToolbox executes client-side inside your browser sandbox. Enjoy zero file uploads, zero accounts, and instantaneous calculations.
Universal Unit Converter
Master multi-unit converter across Length, Weight, Temperature, Volume, Area, Speed, Data, and Time.
Centimeters to Inches (cm to in)
Instant exact metric to imperial length conversion with formula, lookup tables, and worked examples.
Kilograms to Pounds (kg to lbs)
Exact mass converter using NIST multiplier 2.20462262 with step-by-step conversion steps.
Celsius to Fahrenheit (°C to °F)
Temperature conversion using (°C × 9/5) + 32 with standard benchmark boiling/freezing points.
Liters to Gallons (L to gal)
Convert volume between metric liters and US liquid gallons (1 gal = 3.78541 L).
Miles per Hour to Kilometers per Hour
Velocity conversion for vehicle speedometers, aviation benchmarks, and athletic pace.
Loan EMI Calculator
Compute home mortgage, auto, or personal loan payments with full amortization schedules and CSV export.
WACC Calculator
Weighted Average Cost of Capital with CAPM cost of equity, debt tax shields, and Hamada un-levering.
Discounted Cash Flow (DCF) Model
Two-stage UFCF enterprise valuation with Gordon Growth, Exit Multiples, and a 5x5 sensitivity matrix.
NPV & IRR Calculator
Capital budgeting with Net Present Value, Internal Rate of Return, MIRR, and Payback Period.
Loan Amortization Schedule
Detailed periodic payment amortization modeling with extra principal payments and interest savings.
Time Value of Money (TVM)
Solve for PV, FV, PMT, Rate, and Periods across compounding annuities.
Valuation Multiples & Comps
Analyze peer multiples (EV/EBITDA, P/E, EV/Sales) with harmonic means and implied target share prices.
Asset Depreciation Calculator
Straight-Line, Double Declining Balance, Sum-of-the-Years'-Digits, and Units of Production schedules.
DuPont Analysis (3 & 5 Stage)
Deconstruct Return on Equity (ROE) into operating profit margin, asset turnover, and financial leverage.
Compress PDF
Shrink PDF file sizes locally via WebAssembly with zero data sent to external servers.
Merge PDF Files
Combine multiple PDF documents into a single cohesive document in seconds.
Split PDF Pages
Extract specific pages or page ranges from PDF files with instant page previews.
PDF to JPG Converter
Render PDF pages into crisp high-resolution JPEG images locally in memory.
JPG to PDF Converter
Convert image files into a clean standardized multi-page PDF document.
Sign PDF Online
Draw, upload, or type digital signatures onto PDF agreements privately.
Edit PDF
Annotate, highlight, and add text or shapes to existing PDF files.
Organize PDF Pages
Reorder, rotate, duplicate, or delete individual pages within a PDF document.
Add Page Numbers to PDF
Insert customized page numbering headers or footers across PDF documents.
Password Generator
Generate cryptographically secure random passwords using browser Web Crypto APIs.
Text & Code Diff Checker
Compare side-by-side textual revisions and code diffs with character-level change highlighting.
Regex & SQL Studio
Test regular expressions and format SQL queries locally in your browser.
Domain Blacklist & DNS Checker
Audit domain reputation, DNS health, and email blacklist status across major RBLs.
Email Verifier & Syntax Validator
Check email deliverability, MX records, and syntax integrity without sending test emails.
Custom QR Code Generator
Create customizable high-resolution scannable QR codes for URLs, WiFi, and contact vCards.
Image Compressor
Compress and resize PNG, JPG, and WebP images with instant visual quality comparison.
AI Background Remover
Remove photo backgrounds automatically using local in-browser neural networks with zero uploads.
YouTube Thumbnail Downloader
Download original Full HD 1080p and 720p YouTube video cover artwork.
AI Text Polisher & Humanizer
Refine AI drafts with measured sentence rhythm, vocabulary variety, and readability metrics.
Word & Character Counter
Real-time word, character, sentence, reading time, and keyword density analyzer.
AI Prompt Studio
Browse and optimize structured system prompts for ChatGPT, Claude, and Gemini.
Viral Hooks Generator
Generate high-CTR social hooks, opening lines, and short-form video scripts.
YouTube Creator Suite
All-in-one metadata optimizer, title generator, and tag analyzer for YouTube creators.
AI Tools Directory
Curated index of the best generative AI tools, models, and creator workflows.