330+ free online tools,
all in one HQ
PDF tools, image tools, calculators, unit converters, SEO generators, and AI writers — no sign-up, no watermarks, and your files never leave your browser.
Most popular tools
The free tools people reach for most.
Merge PDF
Combine multiple PDFs into one file.
Remove Image Background
Erase image backgrounds instantly with AI.
Compress PDF
Shrink a PDF's file size right in your browser.
Word Counter
Count words, characters, sentences, and reading time.
Image Compressor
Shrink image file size without leaving your browser.
QR Code Generator
Generate a downloadable QR code from any link or text.
BMI Calculator
Calculate your Body Mass Index (BMI).
HEIC to JPG Converter
Convert iPhone HEIC photos to JPG in your browser.
AI Grammar Checker
Fix spelling and grammar with AI.
Percentage Calculator
Work out percentages three different ways.
Images to PDF
Convert JPG and PNG images into a PDF.
Currency Converter
Convert currencies with live exchange rates.
100% free
Every tool is free to use — no trials, no watermarks, no daily limits.
Nothing uploaded
PDF and image tools run in your browser, so your files never leave your device.
Instant & offline-friendly
Tools load fast and work client-side — results the moment you click.
No sign-up
Open any tool and go. Accounts are optional and never required.
All free tools, organized by category
Browse every tool in 14 categories. Each one is free, runs in your browser, and needs no account.
PDF Tools9 tools
Merge, split, compress, rotate, watermark, and convert PDFs — free, in your browser, with nothing uploaded.
- Merge PDFNew
- Split PDFNew
- Images to PDFNew
- PDF to JPGNew
- Rotate PDFNew
- Add Page Numbers to PDFNew
- Watermark PDFNew
- Extract Text from PDFNew
- Compress PDFNew
Image Tools13 tools
Compress, convert, resize, crop, and remove backgrounds from images — free and private, right in your browser.
- Image Compressor
- Image Converter
- Image Resizer
- Image to Base64
- Favicon Generator
- Rotate & Flip ImageNew
- Remove Image BackgroundNew
- Image CropperNew
- Image to Text (OCR)New
- Meme GeneratorNew
- Aspect Ratio CalculatorNew
- Image Color PickerNew
- HEIC to JPG ConverterNew
Calculators47 tools
The calculators people search for daily — BMI, loan, mortgage, percentage, tip, GPA, calorie, sleep, and more.
- BMI CalculatorNew
- Loan CalculatorNew
- Mortgage CalculatorNew
- Compound Interest CalculatorNew
- Tip CalculatorNew
- Salary CalculatorNew
- GPA CalculatorNew
- Calorie CalculatorNew
- Sleep CalculatorNew
- Pregnancy Due Date CalculatorNew
- Final Grade CalculatorNew
- Ovulation CalculatorNew
- Scientific CalculatorNew
- Average CalculatorNew
- Fraction CalculatorNew
- Ratio CalculatorNew
- Body Fat CalculatorNew
- Macro CalculatorNew
- Pace CalculatorNew
- Concrete CalculatorNew
- Square Footage CalculatorNew
- Tile CalculatorNew
- Roofing CalculatorNew
- Mulch CalculatorNew
- Gravel CalculatorNew
- Stair CalculatorNew
- BTU CalculatorNew
- Height CalculatorNew
- Density CalculatorNew
- Mass CalculatorNew
- Molarity CalculatorNew
- GDP CalculatorNew
- Fuel Cost CalculatorNew
- Gas Mileage CalculatorNew
- Mileage CalculatorNew
- Horsepower CalculatorNew
- Engine Horsepower CalculatorNew
- Tire Size CalculatorNew
- Wind Chill CalculatorNew
- Heat Index CalculatorNew
- Dew Point CalculatorNew
- Shoe Size CalculatorNew
- Bra Size CalculatorNew
- Golf Handicap CalculatorNew
- Molecular Weight CalculatorNew
- Grade CalculatorNew
- Speed CalculatorNew
Financial Calculators65 tools
Loan, mortgage, auto, investment, retirement, and debt calculators — free, accurate, and instant.
- Auto Loan CalculatorNew
- Amortization CalculatorNew
- Mortgage Payoff CalculatorNew
- House Affordability CalculatorNew
- Down Payment CalculatorNew
- Debt-to-Income Ratio CalculatorNew
- Credit Card Payoff CalculatorNew
- Debt Payoff CalculatorNew
- Interest CalculatorNew
- Simple Interest CalculatorNew
- Savings CalculatorNew
- CD CalculatorNew
- Present Value CalculatorNew
- Future Value CalculatorNew
- Investment CalculatorNew
- 401(k) CalculatorNew
- IRA CalculatorNew
- Inflation CalculatorNew
- VAT CalculatorNew
- Personal Loan CalculatorNew
- Student Loan CalculatorNew
- Business Loan CalculatorNew
- Home Equity Loan CalculatorNew
- HELOC CalculatorNew
- Repayment CalculatorNew
- Payment CalculatorNew
- Refinance CalculatorNew
- Debt Consolidation CalculatorNew
- Budget CalculatorNew
- Commission CalculatorNew
- Depreciation CalculatorNew
- Margin CalculatorNew
- Rent CalculatorNew
- Annuity Payout CalculatorNew
- Annuity CalculatorNew
- Roth IRA CalculatorNew
- Lease CalculatorNew
- Auto Lease CalculatorNew
- College Cost CalculatorNew
- Average Return CalculatorNew
- Payback Period CalculatorNew
- Rental Property CalculatorNew
- Bond CalculatorNew
- Mutual Fund CalculatorNew
- RMD CalculatorNew
- Income Tax CalculatorNew
- Take-Home Paycheck CalculatorNew
- FHA Loan CalculatorNew
- VA Mortgage CalculatorNew
- Pension CalculatorNew
- Estate Tax CalculatorNew
- Cash Back or Low Interest CalculatorNew
- Interest Rate CalculatorNew
- APR CalculatorNew
- IRR CalculatorNew
- Retirement CalculatorNew
- Social Security CalculatorNew
- Credit Card CalculatorNew
- Boat Loan CalculatorNew
- Real Estate CalculatorNew
- Rent vs Buy CalculatorNew
- Marriage Tax CalculatorNew
- Finance Calculator (TVM)New
- Canadian Mortgage CalculatorNew
- UK Mortgage CalculatorNew
Health & Fitness Calculators24 tools
BMR, TDEE, ideal weight, body fat, macros, heart rate, and more — free health and fitness calculators.
- BMR CalculatorNew
- TDEE CalculatorNew
- Ideal Weight CalculatorNew
- Healthy Weight CalculatorNew
- Lean Body Mass CalculatorNew
- Body Surface Area CalculatorNew
- Calories Burned CalculatorNew
- One Rep Max CalculatorNew
- Target Heart Rate CalculatorNew
- Protein CalculatorNew
- Carbohydrate CalculatorNew
- Fat Intake CalculatorNew
- BAC CalculatorNew
- GFR CalculatorNew
- Army Body Fat CalculatorNew
- Body Shape CalculatorNew
- Pregnancy Weight Gain CalculatorNew
- Pregnancy CalculatorNew
- Pregnancy Conception CalculatorNew
- Conception CalculatorNew
- Period CalculatorNew
- Anorexic BMI CalculatorNew
- Overweight CalculatorNew
- Weight Watchers Points CalculatorNew
Math Calculators37 tools
Percentages, exponents, roots, geometry, statistics, and algebra — free math calculators and solvers.
- Percent Error CalculatorNew
- Exponent CalculatorNew
- Root CalculatorNew
- Log CalculatorNew
- Half-Life CalculatorNew
- Pythagorean Theorem CalculatorNew
- Right Triangle CalculatorNew
- Slope CalculatorNew
- Distance CalculatorNew
- Circle CalculatorNew
- Area CalculatorNew
- Volume CalculatorNew
- Surface Area CalculatorNew
- Z-Score CalculatorNew
- Confidence Interval CalculatorNew
- Sample Size CalculatorNew
- Probability CalculatorNew
- Permutation and Combination CalculatorNew
- Quadratic Formula CalculatorNew
- Scientific Notation CalculatorNew
- Rounding CalculatorNew
- GCF CalculatorNew
- LCM CalculatorNew
- Factor CalculatorNew
- Number Sequence CalculatorNew
- Standard Deviation CalculatorNew
- Statistics CalculatorNew
- Mean, Median, Mode, Range CalculatorNew
- Triangle CalculatorNew
- Matrix CalculatorNew
- Binary CalculatorNew
- Hex CalculatorNew
- Big Number CalculatorNew
- Basic CalculatorNew
- Long Division CalculatorNew
- Prime Factorization CalculatorNew
- P-value CalculatorNew
Unit Converters22 tools
Convert length, weight, temperature, speed, area, volume, data size, currency, and number bases — instantly.
- Number Base Converter
- Roman Numeral Converter
- Temperature Converter
- Data Size Converter
- Length Converter
- Weight Converter
- Area Converter
- Volume Converter
- Speed Converter
- Time Converter
- Pressure Converter
- Energy Converter
- Power Converter
- Frequency Converter
- Angle Converter
- Force Converter
- Torque Converter
- Data Transfer Rate Converter
- Fuel Economy Converter
- Currency Converter
- Number to Words ConverterNew
- Conversion CalculatorNew
Text & Web Utilities48 tools
Everyday web and text helpers — word counter, case converter, JSON formatter, QR & barcode generators, and more.
- Word Counter
- Case Converter
- URL Slug Generator
- Base64 Encoder / Decoder
- URL Encoder / Decoder
- Text Cleaner
- Lorem Ipsum Generator
- Password Generator
- JSON Formatter
- Hash Generator
- UUID Generator
- HTML Entity Encoder
- JWT Decoder
- Text to Binary Converter
- QR Code Generator
- Random Number Generator
- Regex Tester
- CSV to JSON Converter
- Morse Code Translator
- Email Signature Generator
- Find and Replace
- Text Diff Checker
- Cron Expression Explainer
- Reading Time Calculator
- Random Word Generator
- Privacy Policy Generator
- Terms of Service Generator
- Wheel SpinnerNew
- Invoice GeneratorNew
- Signature MakerNew
- What Is My IP AddressNew
- Coin FlipNew
- Dice RollerNew
- Text RepeaterNew
- What Is My Screen ResolutionNew
- Alphabetical Order ToolNew
- Emoji Copy and PasteNew
- Barcode GeneratorNew
- Text to SpeechNew
- Reverse Text GeneratorNew
- PX to REM ConverterNew
- Ohm's Law CalculatorNew
- Electricity Cost CalculatorNew
- Voltage Drop CalculatorNew
- Bandwidth CalculatorNew
- Resistor Color Code CalculatorNew
- IP Subnet CalculatorNew
- Love CalculatorNew
AI Writing Tools13 tools
AI-powered writing tools — grammar checker, summarizer, translator, email writer, and content generators.
- AI Meta Description WriterNew
- AI Blog Title GeneratorNew
- AI Product Description WriterNew
- AI Ad Copy GeneratorNew
- AI Social Media Caption GeneratorNew
- AI Paragraph RewriterNew
- AI Content Idea GeneratorNew
- AI FAQ GeneratorNew
- AI Text SummarizerNew
- AI Grammar CheckerNew
- AI TranslatorNew
- AI Email WriterNew
- AI YouTube Title & Description GeneratorNew
SEO Tools10 tools
Generate and check the on-page signals search engines read — meta tags, schema, sitemaps, and search previews.
- Meta Tag GeneratorNew
- SERP Snippet PreviewNew
- Schema Markup GeneratorNew
- Robots.txt Generator
- XML Sitemap Generator
- Hreflang Tag Generator
- Keyword Density Checker
- llms.txt GeneratorNew
- Headline Analyzer
- Readability Checker
Date & Time Tools12 tools
Calculate ages, date differences, work hours, and time zones, and convert Unix timestamps — fast and accurate.
- Age Calculator
- Date Difference Calculator
- Unix Timestamp Converter
- Timer & StopwatchNew
- Time Zone ConverterNew
- Hours CalculatorNew
- Date CalculatorNew
- Day of the Week CalculatorNew
- Day CounterNew
- Time Duration CalculatorNew
- Time CalculatorNew
- Time Card CalculatorNew
Design & Color Tools5 tools
Color converters, palettes, gradients, contrast checks, and CSS generators for designers and developers.
- Color Converter
- CSS Gradient Generator
- Color Palette Generator
- Color Contrast Checker
- CSS Box Shadow Generator
Social & Campaign Tools6 tools
Build trackable UTM links, hashtags, and perfect social share previews before you post.
- UTM Campaign URL BuilderNew
- Open Graph GeneratorNew
- Hashtag Generator
- Social Media Character Counter
- Fancy Text GeneratorNew
- YouTube Thumbnail DownloaderNew
Marketing Calculators19 tools
Fast, accurate calculators for ROI, ROAS, CPC, conversion rate, and other growth and ad-spend math.
- ROI Calculator
- ROAS Calculator
- CPC Calculator
- CPM Calculator
- CPA Calculator
- CTR Calculator
- Conversion Rate Calculator
- CAC Calculator
- Customer LTV Calculator
- Average Order Value Calculator
- Profit Margin Calculator
- Break-Even Calculator
- Discount Calculator
- Percentage Change Calculator
- Churn Rate Calculator
- Engagement Rate Calculator
- Percentage Calculator
- Markup Calculator
- Sales Tax Calculator
Frequently asked questions
Are the tools really free?
Yes — every tool on Digital Drive HQ is free to use with no sign-up, no watermarks, and no daily limits. The optional HQ Pro plan only removes ads and adds convenience features like batch processing and saved history.
Do I need to sign up or install anything?
No. There's nothing to download and no account required. Open any tool in your browser and start using it immediately.
Are my files and data safe?
The PDF, image, and text tools run entirely in your browser, so your files are never uploaded to a server — they stay on your device. That's a core design principle of the site.
What kinds of tools does Digital Drive HQ have?
Over 320 tools across PDF, image, calculators, unit converters, text and web utilities, AI writing, SEO, date and time, design and color, and social tools — from merging PDFs and removing image backgrounds to BMI, currency conversion, mortgage and tax calculators, and grammar checking.
Do the tools work on mobile?
Yes — the site is fully responsive and the tools work in any modern browser on phones, tablets, and desktops.
Do more with HQ Pro
Remove ads, batch-process files, save your history, and unlock unlimited AI — all for less than a coffee a month.