How-to guides
Short, practical walkthroughs for the jobs people search for most — each one ends in a free tool that does it for you.
- How to Merge PDF Files (Free, No Upload)Combine several PDFs into one file in under a minute — on Windows, Mac, iPhone or Android. Free, no sign-up, and your files never leave your device. 3 min read
- How to Compress a PDF (Free, Small Enough for Email)Shrink a PDF for email or chat in seconds: pick a level, compare the size before and after, and download. Free, no sign-up, nothing uploaded. 4 min read
- How to Split a PDF and Extract Pages (Free)Split a PDF into separate files or pull out just the pages you need — by range, page by page or in equal chunks. Free, no sign-up, nothing uploaded. 3 min read
- How to Convert JPG to PDF (Photos to PDF, Free)Turn JPG, PNG or phone photos into one PDF: put them in order, pick A4 or Letter, set margins and download. Free, works on iPhone, nothing uploaded. 3 min read
- How to Convert PDF to JPG or PNG (Free, High Quality)Turn PDF pages into JPG or PNG images up to 300 DPI. Pick the pages, preview every image, download one by one or as a ZIP. Free, nothing uploaded. 3 min read
- How to Sign a PDF Online for Free (No Printing)Sign a PDF without printing: draw, type or upload your signature, add the date and initials, drag them into place and download. Free, works on iPhone. 4 min read
- How to Edit a PDF for Free (Add Text, No Upload)Add text, highlights, white-out, drawings and images to any PDF for free — on Windows, Mac, iPhone or Android. No sign-up, and nothing is uploaded. 3 min read
- How to Add Page Numbers to a PDF (Free, No Upload)Number the pages of any PDF: pick 1, 1 / N or Page 1 of N, choose a corner, skip the cover page and download. Free, no sign-up, works on phones too. 4 min read
- How to Add a Watermark to a PDF (Text or Logo, Free)Stamp “CONFIDENTIAL”, “COPY” or your logo on a PDF. Set size, opacity, angle and position, or tile it across the page. Free, no sign-up, nothing uploaded. 4 min read
- How to Rearrange PDF Pages (Reorder, Rotate, Delete)Reorder, rotate and delete PDF pages with a preview of every page, then save a clean copy. Free, no sign-up, works on phones, and nothing is uploaded. 3 min read
- How to Fill a PDF Form Online (Free, No Printing)Type into PDF form fields, tick boxes and pick options — or type anywhere on a scanned form — then download the filled PDF. Free, no sign-up, private. 4 min read
- How to Remove the Background from an Image (Free)Cut out people, products and pets and save a transparent PNG, or swap in a new colour, blur or photo. Free AI that runs in your browser, no upload. 3 min read
- How to Compress Images and Reduce Photo Size (Free)Shrink photos for email, forms and websites: compress, resize and convert PNG to JPG or WebP in bulk, and see the size saved before you download. 3 min read
- How to Extract Text from an Image (Free OCR, Thai too)Copy text from photos, screenshots and scanned PDFs with free OCR that runs in your browser. Works with Thai and English, with no upload or sign-up. 3 min read
- How to Remove Location (GPS) from Photos Before SharingCheck whether your photos reveal where they were taken, then strip GPS and other EXIF data in one click — for iPhone and Android photos. Free, private. 4 min read
- How to Record Your Screen (Free, No Watermark)Record your screen, a window or a browser tab with sound, mic and webcam. Free, no watermark, no time limit and nothing to install — saved to your device. 4 min read
- How to Trim a Video Online (Free, No Watermark)Cut the start and end off a video in your browser, mute it or shrink it for LINE and email. Free, no watermark, no upload — on your phone or computer. 4 min read
- How to Make a GIF from a Video (Free, Online)Turn a few seconds of any video into an animated GIF: pick the clip, set size, speed and loop, add a caption. Free, no watermark, nothing uploaded. 4 min read
- How to Scan a QR Code on a Laptop or PC (Free)Scan a QR code on your laptop with the webcam, or read one from a screenshot or image already on your screen. Free, in your browser, no app needed. 5 min read
- How to Create a Wi-Fi QR Code (Share Your Password)Make a free Wi-Fi QR code so guests join your network by scanning — no typing passwords. Works with iPhone and Android, never expires, no sign-up. 3 min read
- How to Create a PromptPay QR Code (With Amount)Make a PromptPay QR for your mobile number, ID or e-Wallet, with a fixed amount or an open one. Free, no sign-up, ready to print or send on LINE. 4 min read
- How to Calculate Thai Personal Income Tax (2025)Work out your Thai personal income tax step by step: expenses, allowances, the 0–35% brackets and whether you get a refund. Free calculator, no sign-up. 5 min read
- How to Make an Invoice in Thailand (VAT 7% & WHT)Create a Thai invoice, quotation, receipt or tax invoice with VAT 7% and withholding tax worked out for you. Bilingual, free, print or save as PDF. 4 min read
- Convert Buddhist Year (พ.ศ.) to Gregorian (ค.ศ.)Turn a Thai Buddhist Era year or date into the Gregorian calendar and back: subtract 543, or let the free converter do years and full dates for you. 4 min read
- Fix Thai Typed on the English Keyboard (and Back)Typed l;ylfu instead of สวัสดี? Turn text typed in the wrong Thai or English keyboard layout back into what you meant, in one paste. Free, no sign-up. 4 min read
- How to Calculate a Loan Payment (Home & Car Loans)Work out the monthly payment, total interest and payoff date for a mortgage or a Thai flat-rate car loan, with the formulas explained. Free, no sign-up. 5 min read
- How to Count Words and Characters (English & Thai)Count words, characters, sentences and reading time as you type, and check length limits for X posts, meta descriptions and SMS. Free, works with Thai. 4 min read
- How to Test Your Internet Speed (Download, Upload, Ping)Check your download and upload speed, ping and jitter in under a minute, and see what your connection can handle. Free, no sign-up, data saver for mobile. 4 min read
- How to Create a Strong Password (and Remember It)Make strong, unique passwords and easy-to-remember passphrases in seconds, plus the habits that actually keep accounts safe. Free and private. 4 min read
- How to Generate a CRON_SECRET for Vercel Cron JobsGenerate a secure CRON_SECRET, store it on Vercel, GitHub or Cloudflare, and lock down your cron endpoint with a Bearer header check. Free, in-browser. 4 min read
- How to Format JSON (Beautify, Validate & Fix Errors)Pretty-print JSON instantly, find the exact line and column of any error and fix the usual mistakes. A free JSON formatter that runs in your browser. 4 min read