Guides
Short, practical answers to the questions behind the tools: how big an attachment can be, how to sign a PDF without printing, how to get a photo ready for the web. Every guide links to the tool that does the job, in your browser.
Email attachment size limits
Attachment limits on Gmail, Outlook, Yahoo and iCloud, why a 24 MB file bounces at 25 MB, and how to shrink a PDF, photo or video so it goes through.
How to send a large PDF on WhatsApp
WhatsApp allows documents up to 2 GB, but large PDFs are slow to send and open. How to make a PDF small enough to send and read on a phone, without an app.
Get a PDF under 1 MB (or 200 KB)
Job portals, visa applications and official forms cap uploads at 1 MB, 500 KB or 200 KB. How to hit the limit and keep the text readable, in your browser.
Merge, reorder and clean up PDF pages
Combine several PDFs, put the pages in the right order, remove blank or duplicate pages and fix sideways scans, without uploading the files anywhere.
Sign a PDF without printing it
Draw your signature once, place it on the page, download the signed PDF. What this kind of signature is good for, and when you need a certificate instead.
Photos to a single PDF on your phone
How to put several photos of pages into one PDF from Android or iPhone, in the browser, with the pages straight and in order, and how to get them back out.
Scan documents with your phone, without an app
How to scan a contract, a form or a stack of pages with the phone camera from the browser: edges found, pages straightened, one PDF, nothing uploaded.
ID card front and back in one PDF
How to photograph both sides of an ID card into one clean PDF at card size, what to write on the copy before sending it and what to black out.
A small scan for e-mail or WhatsApp
Why a phone scan is huge, how to make one that goes through e-mail and WhatsApp as a document, and what to check so it is still readable on the other side.
Edit a PDF in your browser
What the browser PDF editor does today, what it does not do yet, and how to check that your file never leaves your device.
Text
Turn a scanned PDF or photo into text (OCR)
A scan is a picture; OCR reads the letters in it. How to get editable text or a searchable PDF from a scan or photo, and which languages work.
Compare two versions of a text
How to find every change between two versions of a document, when to compare by line, word or character, and how to check word count or reading time too.
A searchable PDF from a photo
Turn a photo of a document into a PDF you can search and copy from, with the text recognised on your device: the languages that work and how to check.
Images
Watermark photos and documents before sharing
Why you should write the purpose on a copy of your ID, how to stamp DRAFT on a contract or your name on a photo, and how to do it in the browser.
Prepare photos for a website
What width to export, when to use WebP or AVIF instead of JPG, and how to get a photo under 200 KB without visible loss, in the browser.
iPhone photos (HEIC) on Windows
Why iPhone photos arrive as HEIC, why Windows and many sites cannot open them, and the fastest way to turn them into JPG in your browser, EXIF kept.
Passport photo (35×45 mm) at home
The 35×45 mm format, the head size and background most countries ask for, and how to crop a phone photo to the exact ratio and pixel size in your browser.
Video
Video too big to send
Phone videos are 100 MB a minute. Three ways to make a video shareable in the browser: re-encode at 720p, cut a moment into a GIF, or extract the audio.
Video for Instagram
The ratios Instagram uses for stories, reels and the feed, what cropping and resizing each do, and how to compress a clip before upload, in the browser.
Fix a sideways video
Why a phone video plays sideways on a computer, how to rotate it by 90 or 180 degrees in the browser, and how to un-mirror a selfie clip. Nothing uploaded.
QR & passwords
QR codes: make one, read one, Wi-Fi and contact cards
What a QR code can hold, how to make one that never expires, how to share Wi-Fi or a contact card, how to read a code from a screenshot, scams to avoid.
How to pick a strong password
What makes a password strong (length, not symbols), why passphrases work, how a manager changes the game, and how to generate one randomly on your device.
Check that a tool does not upload your files
"Secure" and "in your browser" are claims. How to verify them yourself with the browser's network tab, what to look for, how this site stays checkable.