Blog
Clear, straightforward tutorials for everyday tasks with FORMARTIO tools.
How to calculate percentages easily
Percentage of a total, raise, drop, or tip: simple rules so you don't mess up everyday numbers.
How to calculate discounts fast without a calculator
30% off an already marked-down price? Get the final price in seconds when tags confuse you.
How to split expenses with friends without fights or spreadsheets
Group trip, shared dinner, or roommate bills: split fairly and know who owes whom.
How to calculate ROI on any investment or campaign
Did the ad campaign or inventory purchase pay off? ROI sums it up in an easy-to-compare percentage.
Compound interest: the math trick that grows your savings
Small monthly contributions add up more than you think with compound interest. See the effect with examples.
How to calculate your monthly mortgage payment before signing
Simulate payment with different terms and rates before committing to the bank. Clear numbers, no surprises.
How to calculate net salary from gross pay
You negotiated gross but take home net. Understand deductions and how much you actually keep.
How to calculate VAT in Chile, Spain, and Mexico
19%, 21%, or 16% depending on country. Round-number examples to invoice correctly or check a receipt.
How to write numbers in words for checks and contracts
Banks reject checks when words don't match figures. Convert amounts to words without spelling errors.
How to validate a URL before publishing or using it in code
Catch malformed URLs before deploying a button or mass email. Avoid silly production bugs.
How to create UTM URLs to track campaigns in Google Analytics
Without UTM you can't tell which link drove the sale. Build trackable links for email, ads, and social without typos.
How to convert XLSX to XLS for old Excel
Someone asks for XLS and you only have XLSX. Convert the format without fighting Office compatibility.
How to create passwords that won't get hacked
Short, reused passwords are the most common breach. Generate strong keys and understand what makes them secure.
How to shorten long links for free without signing up
URLs with UTM or mile-long paths look ugly in stories and slides. Shorten them in one click.
How to generate a QR code for free
Generate a QR code for your menu, WiFi, contact card, or landing page. Download PNG ready to print.
Base64: what it is, what it's for, and how to encode without code
Base64 shows up in APIs, JWTs, and attachments. Learn what it does and how to encode or decode without scripts.
How to format messy JSON in seconds
Paste minified or broken JSON and make it readable for debugging APIs, webhooks, or configs. Validation included.
How to send heavy videos on WhatsApp without ugly compression
Shrink a video before sending and keep more control over final quality in the chat.
How to convert WEBM to MP4 for any device
Screen recording WEBM files don't always play on mobile. Convert to compatible MP4 in your browser.
How to convert MP4 to MP3 free
Extract audio from an MP4 for podcasts, background music, or voice notes. No sketchy converter installs.
How to compress photos for WhatsApp without losing quality
WhatsApp crushes your photos when you send them. Compress first on your terms and avoid surprises when someone downloads them.
How to extract text from an image with OCR
Copy text from a scanned photo, screenshot, or document with OCR. What to expect and how to improve results.
How to convert HEIC to JPG free
iPhone photos in HEIC won't open on many PCs. Convert them to JPG in seconds and share without the hassle.
How to crop an image online in seconds
Crop photos to remove edges, center a face, or match aspect ratio. Free browser tool that works instantly.
How to watermark your photos without Photoshop
Protect your photos before posting online with a visible but discreet watermark. Practical step-by-step setup.
How to resize an image without distorting it
Resize photos for Instagram, LinkedIn, or forms while keeping aspect ratio. No Photoshop or learning curve.
How to remove a photo background free with AI
Remove a photo background for catalogs, logos, or social. Which images work best and how to get a clean PNG.
How to convert images to WebP so your site loads faster
WebP is often lighter than JPG. Learn how to convert your images to WebP free in the browser.
JPG vs PNG: when to convert and how to do it free
Learn when it makes sense to go from JPG to PNG and how to do it online without losing transparency or unnecessary quality.
How to compress images without losing quality
Reduce photo file size for web, email, or forms without turning them into a blurry mess. Which settings actually matter.
How to rotate a PDF when it arrives sideways
Turn pages in a scanned or misoriented PDF in seconds. A quick fix when the document arrived sideways.
How to convert multiple images to PDF in order
Combine several photos or screenshots into one PDF in the right order. Ideal for invoices, home scans, and documentation.
How to split PDF pages without Adobe
Split a PDF into several files or extract only the pages you need. No installs or subscriptions.
How to compress a PDF without ruining the text
Reduce PDF file size for email or WhatsApp without making text illegible. Tips that actually work.
How to convert PDF to JPG for free
Convert PDF to JPG page by page or download a ZIP with all images. Handy for social media, presentations, and WhatsApp.
How to convert PDF to Excel free without surprises
Extract PDF tables to Excel without paying for licenses. What to expect from the result and how to clean it up before working with the data.
How to convert JPG to PDF free
Turn JPG photos into PDF in one click. Perfect for paperwork, email attachments, or archiving images in a single document.
How to convert Word to PDF free in seconds
Convert Word to PDF in seconds from your browser. Ideal for resumes, reports, and documents that should not be edited.
How to merge multiple PDF files into one
Merge multiple PDF files into one for free, in the order you choose, without installing Adobe or creating accounts.
How to convert PDF to Word for free
Convert PDF to Word for free in your browser — no software installs, no uploading files to unknown servers.