Guides & tutorials
Simple, step-by-step help for everyday PDF and image tasks.
Laptop Keyboard Not Working? How to Find and Fix Dead KeysSome keys not typing or the whole keyboard dead? Test every key online, then try these fixes: Filter Keys, Num Lock, drivers, cleaning and external keyboards.2 min read
Microphone Not Working on Windows 11 or 10 – 9 Quick FixesMic not working in Zoom, Teams or Discord? Test it online, then fix it step by step: privacy settings, input device, volume, drivers and app permissions.3 min read
Mouse Double-Clicking on a Single Click – How to Test and Fix ItFiles open by themselves or drag-and-drop fails? Test your mouse for double-click faults online, then fix it: settings, cleaning, debounce and switch repair.2 min read
Webcam Not Working or Not Detected – How to Fix ItBlack screen or 'no camera found'? Test your webcam online, then fix privacy settings, camera switches, drivers and app permissions on Windows and Mac.2 min read
How to Compress a PDF to 100 KB, 200 KB or Under 500 KBOnline form says the PDF must be under 100 KB or 200 KB? Learn how to shrink a PDF to a small size in KB for free, and what to do if it still won't fit.3 min read
How to Compress a PDF for Email – Make It Small Enough to SendPDF too big to email or upload? Learn how to compress a PDF to under 1 MB or 200 KB for free, without losing text quality, in a few easy steps.3 min read
How to Convert HEIC to JPG – Open iPhone Photos AnywhereCan't open iPhone photos on Windows or upload them to a form? Convert HEIC to JPG for free and set your iPhone to save JPG automatically.2 min read
How to Convert PNG to JPG – Free, Fast and PrivateConvert PNG images to JPG in seconds, for free. Learn when JPG is better than PNG, what happens to transparency, and how to keep the quality high.3 min read
How to Edit Text in a PDF for Free – Without Adobe AcrobatChange words, dates, names or numbers in a PDF for free. Click existing text to edit it, add new text, white-out mistakes and save – no software needed.3 min read
How to Merge PDF Files into One – Windows, Mac, Android & iPhoneCombine several PDFs into one file in seconds on Windows, Mac, Android or iPhone. Free, no software to install – plus tips to put files in the right order.3 min read
How to Password Protect a PDF – Free and SecureAdd a password to any PDF for free with strong AES-256 encryption. Control printing and copying, and learn how to choose a safe password.3 min read
How to Reduce Photo and Signature Size in KB for Online Application FormsOnline form says photo must be under 50 KB or 20 KB? Learn how to reduce image size in KB and set exact pixels for exam, job and government forms – free.3 min read
How to Delete Pages from a PDF – Quick and FreeDelete unwanted pages from a PDF in seconds. See page thumbnails, select pages or type ranges like 2, 5-7, and download a clean PDF. Free and no sign-up.3 min read
How to Sign a PDF Without Printing ItSign PDF documents on your computer or phone without printing and scanning. Draw, type or upload your signature, place it on the page and download – free.3 min read
How to Remove a Password from a PDF – Bank Statements, Payslips and MoreTired of typing the password every time? Remove the password from a PDF you own – like a bank statement or payslip – for free, in a few simple steps.2 min read
JPG vs PNG vs WebP vs AVIF – Which Image Format Should You Use?A simple comparison of JPG, PNG, WebP and AVIF: quality, file size, transparency and compatibility, with clear advice for photos, logos, websites and forms.3 min read
Passport Size Photo for Online Forms in India – Size in cm, Pixels and KBPassport size photo explained: 3.5 × 4.5 cm in pixels, typical KB limits for online forms, background rules, and how to resize and compress your photo for free.3 min read
How to Scan Documents to PDF with Your Phone – Android and iPhoneScan certificates, forms and receipts to PDF with your Android phone or iPhone – free built-in apps, tips for clear scans, and how to combine and shrink PDFs.2 min read