Guides & Tutorials
Clear, practical walkthroughs for the things people actually do with files — compressing images to an exact size, removing backgrounds, converting and OCR-ing PDFs, and working out money calculations. Every guide is written by the team that builds the tools and links straight to a free, private, in-browser tool.
Image Guides · 4 min read
How to View a Photo's Hidden Metadata (EXIF, GPS & More)
Reveal the camera, date, settings and GPS location hidden inside a photo — and decide what to strip before sharing.
Read guideImage Guides · 3 min read
How to Make a Meme (Free, No Watermark, No Upload)
Add classic impact-text captions to any image and export clean with no watermark — free and private in your browser.
Read guideImage Guides · 3 min read
How to Get the Color Code (HEX) from an Image
Pick any pixel and get its HEX and RGB code for CSS, design and brand matching — free and private in your browser.
Read guideImage Guides · 3 min read
How to Round the Corners of an Image (Free, No Upload)
Give any image soft rounded corners and export a transparent PNG — for avatars, icons and cards — free and private in your browser.
Read guideImage Guides · 4 min read
How to Adjust Brightness & Contrast on a Photo (Free)
What brightness, contrast and saturation each do — and the order to adjust them in — free and private in your browser.
Read guideImage Guides · 3 min read
How to Flip or Rotate an Image (Free, No Upload)
Turn a sideways photo upright or mirror it — and know when to flip vs rotate — free and private in your browser.
Read guideImage Guides · 4 min read
How to Add a Watermark to a Photo (Free, No Upload)
Stamp your name, handle or © across a photo — with control over opacity and placement — free and private in your browser.
Read guideImage Guides · 4 min read
How to Blur the Background of a Photo (Free, No Upload)
Get that DSLR-style background blur behind your subject with AI — free and private, entirely in your browser.
Read guideImage Guides · 5 min read
How to Upscale an Image Without Losing Quality (Free)
Make small or blurry images bigger and sharper with AI — detail added, not just stretched — free and private in your browser.
Read guideImage Guides · 4 min read
How to Crop an Image to a Specific Size or Ratio
Cut a photo to a square, a fixed ratio, or exact pixels — for a profile, upload or print — free and private in your browser.
Read guideImage Guides · 5 min read
How to Resize an Image to Exact Dimensions (Free, No Upload)
Set exact width and height for any upload or profile picture — without stretching — free and private in your browser.
Read guideImage Guides · 4 min read
How to Convert PNG to JPG for Free (No Upload)
Turn PNGs into smaller, universally accepted JPGs — free, private, and instant, entirely in your browser.
Read guideImage Guides · 5 min read
How to Convert HEIC to JPG (iPhone Photos) for Free
Turn iPhone HEIC photos into universally accepted JPGs — free, private, no app to install.
Read guideImage Guides · 6 min read
How to Resize an Image for a Passport or Visa Photo
Hit the exact pixel and KB requirements for passport, visa and exam photos — free and private.
Read guideImage Guides · 5 min read
How to Remove EXIF Metadata (and GPS Location) from Photos
Strip hidden GPS, device and timestamp data from photos before sharing — free and in-browser.
Read guideImage Guides · 6 min read
How to Remove the Background from an Image (Free, No Signup)
How AI background removal works, how to get clean edges, and how to export a transparent PNG — free and private.
Read guideImage Guides · 7 min read
How to Compress Images Without Losing Quality
How compression works, how to hit an exact KB target, and how to shrink photos with no visible quality loss.
Read guidePDF Guides · 3 min read
How to Add a Watermark to a PDF (Free, No Upload)
Stamp DRAFT, CONFIDENTIAL or your brand across every PDF page — with opacity and angle control — free and private in your browser.
Read guidePDF Guides · 3 min read
How to Add Page Numbers to a PDF (Free, No Upload)
Number a PDF's pages — position, format and starting number — for reports and contracts, free and private in your browser.
Read guidePDF Guides · 4 min read
How to Fill Out a PDF Form Online for Free (No Upload)
Type onto any PDF — including flat scans with no fields — then sign and download, free and private in your browser.
Read guidePDF Guides · 4 min read
How to Convert PNG to PDF for Free (No Upload, No Watermark)
Combine PNG screenshots or scans into one tidy PDF — reorder pages, no watermark — free and private in your browser.
Read guidePDF Guides · 4 min read
How to Rotate a PDF and Save It (Free, No Upload)
Turn a sideways scan the right way up and save it for good — free and private, entirely in your browser.
Read guidePDF Guides · 4 min read
How to Convert Word to PDF for Free (No Upload)
Lock your Word document's layout into a PDF that looks identical everywhere — free and private in your browser.
Read guidePDF Guides · 4 min read
How to Convert PDF to JPG for Free (No Upload, No Watermark)
Export PDF pages as JPG images — every page or just the ones you need — free and private in your browser.
Read guidePDF Guides · 4 min read
How to Convert JPG to PDF for Free (No Upload, No Watermark)
Combine photos into one clean PDF — reorder pages, keep quality, no watermark — free and private in your browser.
Read guidePDF Guides · 4 min read
How to Unlock a PDF (Remove the Password) — Free & Private
Strip the password off a PDF you can already open so it opens freely — free and private, entirely in your browser.
Read guidePDF Guides · 5 min read
How to Password Protect a PDF for Free (No Upload)
Encrypt a PDF with a password so only the right people can open it — free and private, entirely in your browser.
Read guidePDF Guides · 5 min read
How to Sign a PDF Online for Free (No Upload, No Account)
Draw, type or upload a signature and drop it onto any page — free, private, and with no account, entirely in your browser.
Read guidePDF Guides · 5 min read
How to Split a PDF into Separate Pages (Free, No Upload)
Extract specific pages, split every N pages, or break a PDF into one file per page — free and privately in your browser.
Read guidePDF Guides · 6 min read
How to Compress a PDF to 100KB, 200KB or 500KB
Hit an exact PDF size limit (100KB, 200KB, 500KB) for upload forms — free and in-browser.
Read guidePDF Guides · 5 min read
How to Merge PDF Files for Free (Without Uploading Them)
Combine several PDFs into one, in any order, free and privately in your browser.
Read guidePDF Guides · 6 min read
How to Convert a PDF to Word (Editable, Free)
Text-layer extraction vs OCR, when to use each, and how to get an editable Word file with minimal cleanup.
Read guideOCR Guides · 6 min read
How to Extract Text from an Image (OCR) for Free
Turn a screenshot, photo or scan into editable text with free, private, in-browser OCR.
Read guideOCR Guides · 7 min read
What is OCR and How Does It Work?
How OCR turns pixels into editable text, why accuracy varies, and how to get the best results.
Read guideCalculator Guides · 6 min read
How to Calculate a Mortgage Payment (PITI) — With Example
The formula behind your monthly mortgage payment, what PITI means, and a worked $400k example.
Read guideCalculator Guides · 5 min read
How to Calculate a Car Payment — With Tax & Trade-In
How the amount financed and monthly car payment are worked out — tax and trade-in included.
Read guideCalculator Guides · 6 min read
How a 401(k) Employer Match Works — And Why It Matters
What '50% up to 6%' really means, how to capture the full match, and how it compounds over a career.
Read guideCalculator Guides · 5 min read
How to Pay Off Credit Card Debt Faster — The Math
Why minimum payments trap you, and how a bigger payment cuts both the time and the interest.
Read guideCalculator Guides · 4 min read
How to Calculate Sales Tax: Add & Remove It — Formula
How to add sales tax to a price and how to reverse it out of a total — with formulas and examples.
Read guideCalculator Guides · 4 min read
How to Calculate the Days Between Two Dates
Count days between two dates accurately — including the inclusive/exclusive trap and how to count only working days.
Read guideCalculator Guides · 4 min read
How to Convert Units: Length, Weight & Temperature
The conversion factors that actually matter — cm↔in, kg↔lb, °C↔°F — with worked examples and a free converter.
Read guideCalculator Guides · 3 min read
How to Count Words and Characters (Free, No Upload)
Count words, characters, sentences and reading time — and hit strict limits with confidence — free and private in your browser.
Read guideCalculator Guides · 3 min read
How to Calculate a Tip and Split the Bill (Quick Guide)
Fast mental math for a 15/18/20% tip, splitting the bill evenly, and the tip-on-tax question answered.
Read guideCalculator Guides · 4 min read
How to Calculate Your Exact Age (Years, Months & Days)
The manual method for an exact age in years, months and days — plus the leap-year trap most people miss.
Read guideCalculator Guides · 5 min read
How to Read a Loan Amortization Schedule (With Example)
How each loan payment splits into interest and principal, why prepaying early saves the most, and the true total cost.
Read guideCalculator Guides · 4 min read
How to Calculate a Discount and Sale Price (With Examples)
The discount and sale-price formulas, quick mental tricks, stacked discounts, and how to find the percent off.
Read guideCalculator Guides · 6 min read
How to Calculate Your Daily Calorie Needs (BMR & TDEE)
Work out your BMR and TDEE with the Mifflin-St Jeor formula, then set calories for cutting, maintaining or gaining.
Read guideCalculator Guides · 6 min read
How to Calculate In-Hand Salary from CTC (With Example)
Why your CTC and your bank credit differ — the gross-to-net breakdown with a worked example.
Read guideCalculator Guides · 6 min read
How to Calculate Compound Interest (Formula & Example)
The compound interest formula, a worked ₹1-lakh example, and why compounding frequency and time do the heavy lifting.
Read guideCalculator Guides · 5 min read
How to Calculate BMI (Formula, Example & Categories)
The BMI formula in metric and imperial, a worked example, the WHO categories, and where BMI falls short.
Read guideCalculator Guides · 5 min read
How to Calculate GST (Add & Remove) — Formula & Examples
How to add GST to a price and how to back it out of a GST-inclusive amount — with formulas and 18% worked examples.
Read guideCalculator Guides · 5 min read
How to Calculate a Percentage (Formulas & Examples)
The three percentage formulas everyone needs — percent of a number, one number as a percent of another, and percentage change — with worked examples.
Read guideCalculator Guides · 6 min read
How to Calculate EMI (Formula, Example & Free Calculator)
The EMI formula explained, a worked ₹10-lakh loan example, and how rate and tenure change what you really pay.
Read guideCalculator Guides · 6 min read
How to Calculate SIP Returns (With Formula & Example)
The SIP future-value formula, a worked ₹10,000/month example, and why starting early matters.
Read guide