The shobfree Blog
Step-by-step guides that get your file work done.
Editor's picks
How to Write Markdown With a Live Preview and Export HTML or .md
Learn the most useful Markdown syntax and write with a live preview that you can copy as HTML or download as .md or .html.
PDF Guides
See all (18) →
PDF Guides
How Private File Tools Work: Everything Runs in Your Browser
What it means that a tool runs in your browser, why it is safer for PDFs, IDs and photos, and what the limits are.
PDF Guides
How to Protect or Unlock a PDF with a Password, Privately in Your Browser
Add a password to a PDF with AES-256 encryption, or remove the password from a PDF you own. Runs in your browser; nothing is uploaded.
PDF Guides
How to OCR a Scanned PDF Free: Bangla and English, in Your Browser
Make a scanned PDF searchable and copyable, or turn it into Word or text. Bangla and English OCR that runs in your browser.
PDF Guides
How to Convert PDF to Word, Excel and PowerPoint in Your Browser
Turn a PDF into an editable Word file, an Excel sheet or PowerPoint slides without uploading it. See what works well and what to expect.
PDF Guides
How to Compress a PDF Without Uploading It: Private and Free in Your Browser
Compress a PDF to 100 KB, 200 KB or 1 MB in your browser. Pick a level or a target size, see the result and download. Nothing is uploaded.
PDF Guides
How to Create a PDF From Scratch: Flyer, Letterhead, Poster
Design a PDF from a blank page or a flyer, letterhead, poster or notice template, add text, shapes, pictures and a signature, free in your browser.
Images and Photos
See all →
Images and Photos
How to Compress, Resize and Convert Many Images at Once with the Image Studio
Crop, rotate, resize, convert to JPG, PNG or WebP and fit a KB limit for up to 30 images at once, with a live before and after, in your browser.
Images and Photos
Bangladesh Passport and Form Photo Sizes: 35x45 mm, 40x50 mm and 300x300 Pixel
The photo sizes asked for in Bangladesh: passport 35x45 mm, 40x50 mm, 45x55 mm, stamp size and online forms in pixels with a KB limit. Make them in your browser.
Images and Photos
How to Make a Photo Collage Online: Layouts, Text, Backgrounds and PDF
Make a photo collage in your browser with grid and mosaic layouts, sizes for Instagram and print, gaps, rounded corners, text and JPG, PNG or PDF download. Free and private.
Images and Photos
How to Edit a Photo Online: Crop, Adjust, Add Text, Stickers
Crop, turn, adjust brightness and colour, add text and stickers, draw and resize a photo in your browser with undo. Free and private.
Images and Photos
How to Turn a Photo into a Pencil Sketch or Cartoon Online
Convert a photo into a pencil sketch, colour sketch or cartoon in your browser, learn how the effect works and which photos give the best results.
Documents and Office
See all →
Documents and Office
How to Make Many Certificates at Once From a List of Names
Make one certificate design and create a PDF with a page for every name in your list, with remembered signer and organisation details. Free in your browser.
Everyday Tools
See all (10) →
Everyday Tools
Everyday Life Tools: Expenses, Bill Splitter, Planners, Photo, Video and Audio Editors
Free everyday tools that run in your browser: expense tracker, bill splitter, meal and packing planners, health tracker, background remover, meme maker, video to GIF and audio trimmer.
Everyday Tools
Everyday Unit Converters: Km to Miles, Celsius to Fahrenheit, Stones, Feet to CM, Oven Gas Mark and Gallons
Free converters for km to miles, Celsius to Fahrenheit, stone to kg, feet and inches to cm, oven temperatures, cm to inches, pounds to kg and litres to gallons.
Everyday Tools
Europe Tools: EU VAT, Ireland Salary, IBAN Check, Time Zones, Easter Dates and Clothing Sizes
Free tools for Europe: EU VAT rates by country, Ireland salary after tax, IBAN validator, Europe time zones, Easter dates, clothing sizes and exchange rates.
Everyday Tools
UK Work Calculators: Bank Holidays, Holiday Pay, Redundancy, Sick Pay, Maternity and Minimum Wage
Free UK work calculators: bank holiday dates, statutory holiday entitlement, redundancy pay, sick pay, maternity pay, minimum wage and child benefit charge.
Everyday Tools
Australian Work and Property Tools: Casual Loading, Leave, Redundancy, Penalty Rates, Rental Yield
Free tools for Australian workers and home buyers: casual loading, annual leave, redundancy pay, penalty rates, pay frequency, rental yield, rent converter and first home deposit.
Everyday Tools
Australian Money Calculators: Super, HECS-HELP, Home Loan, Tax Refund and Bonus
Free Australian calculators for super, HECS-HELP repayments, home loans with offset, tax refund and bonus tax. Private, in your browser, 2025-26 rates.
Money and Finance
See all →
Money and Finance
Canada and New Zealand Calculators: GST/HST, RRSP, Mortgage, PAYE, KiwiSaver and Public Holidays
Free calculators for Canada (GST/HST, RRSP, mortgage, holidays) and New Zealand (PAYE, KiwiSaver, public holidays). Private, in your browser.
Money and Finance
US Home and Car Calculators: PMI, Closing Costs, Property Tax, Rent vs Buy, Auto Lease and EV Charging
Free US calculators for PMI, closing costs, property tax, rent vs buy, car leases and EV charging cost, plus time zones and federal holidays.
Money and Finance
US Retirement and Savings Calculators: 401(k), Roth IRA, CD, RMD and the Rule of 72
Free US calculators for 401(k) growth with employer match, Roth IRA, CD interest, required minimum distributions and the rule of 72.
Money and Finance
US Tax Calculators: Federal Income Tax, Self-Employment Tax, Capital Gains, FICA and Overtime
Free US tax calculators for federal income tax, self-employment tax, capital gains, FICA and sales tax, plus overtime pay. Private and in your browser.
Money and Finance
UK Home and Bills Calculators: Mortgage Affordability, Overpayment, Energy Bills and Inheritance Tax
Free UK calculators for mortgage affordability, mortgage overpayments, energy bills, gas m3 to kWh, late payment interest and inheritance tax.
Money and Finance
UK Tax and Pay Calculators: National Insurance, Student Loan, CGT, Dividends and Pay Rise
Free UK calculators for National Insurance, student loan repayments, capital gains tax, dividend tax, self-employed tax, pension relief and pay rises. Private, in your browser.
Health and Fitness
See all →
Health and Fitness
Health and Life Calculators: Blood Alcohol, One Rep Max, Dog Age, Steps to Km and Countdowns
Free calculators for blood alcohol content, one rep max, dog age, steps to kilometres, Christmas countdown and anniversary dates.
Health and Fitness
What Is Waist-to-Hip Ratio and What Is a Healthy Number?
Learn how to measure your waist and hips, how to work out the ratio, the WHO risk limits for men and women and what to do with the result.
Health and Fitness
How to Test Your Reaction Time and Improve It
Measure your reaction time in milliseconds, learn what a typical score is, what affects it and how sleep, practice and setup can improve it.
Study and Productivity
See all →
Study and Productivity
How to Solve a Quadratic Equation: Formula and Examples
Solve ax squared plus bx plus c equals zero with the quadratic formula, understand the discriminant and complex roots, and check answers with a solver.
Design and Social Media
See all →
Design and Social Media
How to Turn Typed Text into Handwriting (Bangla, English)
Create a handwritten-style page from typed text on lined, plain or grid paper, with tips on realistic results and honest, ethical use.
Design and Social Media
How to Make Quote Images for Facebook and Instagram
Create shareable quote pictures with the right size, readable fonts and good contrast, with a step-by-step guide and design tips for social media.
Developer and Text Tools
See all →
Developer and Text Tools
How to Minify CSS and Why It Speeds Up Your Website
Learn what CSS minification does, how much it saves, what can go wrong and how to combine it with compression and caching for faster pages.
Small Business
See all →
Small Business
Freelance and Marketing Calculators: Hourly Rate, ROAS, CTR and Late Payment Interest
Free calculators for freelancers and marketers: hourly rate, ROAS and break-even, CTR, conversion rate, CPC, CPA and late payment interest.