Guides and tips for creators
HEIC is the iPhone format half the digital world can't open. Here's how to convert it to JPG in seconds, with nothing to install and without your photos ever leaving your device.
Every social network has its ideal image size. Updated table of dimensions for Instagram, TikTok, YouTube, X, LinkedIn, Pinterest, and Facebook, with the recommended format for each.
JPG for photos, PNG for graphics, WebP for lightweight web, and HEIC for the iPhone. We explain the differences and the mistake of saving photos as PNG.
Most websites upload your photo to their server to process it. There's another way: doing it in your browser, without the file ever leaving your device. More private, faster, and with no limits.
Phone photos weigh far more than necessary. By combining compression and resizing, you reduce their size with no visible loss, so they upload fast and don't clog emails or websites.
Your photos carry hidden data: GPS location, phone model, exact date and time. We explain what EXIF metadata is, why it matters for your privacy, and how to remove it.
WebP weighs less than JPG at the same quality, but JPG remains the most compatible. We explain when to choose each with real data, not marketing.
The file is too large to attach. We explain how to compress photos for email quickly, keeping visible quality intact, with nothing to install.
Your iPhone photos in HEIC are small on the phone, but when shared they convert and the size balloons. We explain why and how to get light photos without losing quality.
A single image doesn't fit every network. We explain how to generate all versions (square, vertical, horizontal) at once, with the exact dimensions for each platform.
WebAssembly lets you run powerful software directly in your browser, with nothing to install. We explain what it is, how it works, and why it changes online tools.
Phone videos are too heavy to upload quickly to social media. We explain how to compress them while keeping quality, with the exact dimensions for each platform.
MP4, MOV, WebM, H.264, H.265... Which video format do you need for each social network? A clear guide without jargon, with the resolution and ratio for each platform.
When you use an online tool for your photos or videos, where do your files end up? Not all services are the same. We explain the differences and how to protect your privacy.
Learn how image compression works, the difference between lossy and lossless methods, and how to shrink file sizes while keeping your photos sharp — all without uploading anything.
A practical guide to resizing images for Instagram, TikTok, YouTube, LinkedIn, and more — with the right dimensions, aspect ratios, and a privacy-first workflow.
Understand the fundamental differences between PNG and JPG, when each format shines, and how to convert between them without compromising quality or privacy.
Discover what makes WebP the modern image format of choice, how it compares to JPG and PNG, and how to convert your images to WebP privately in your browser.
Most QR code generators send your data to a server. Learn how client-side QR generation works, why it matters for privacy, and how to create QR codes that stay on your device.
Every photo you take stores hidden metadata — GPS coordinates, camera settings, timestamps. Learn what EXIF data is, what it reveals, and how to check or remove it.
Learn how color palette extraction works, why designers use it, and how pixel sampling and color quantization turn any photo into a usable set of brand colors.
Learn the official Spanish DNI photo size (32×26mm), requirements, and how to crop and resize your photo at home using free browser-based tools. Save 5-10€ on photo shops.
Learn how to compress and resize your CV photo to under 200KB while keeping it sharp. Free browser-based tools, no uploads required. Ideal for job portals with file size limits.
Learn how to prepare perfect product photos for Wallapop. Crop, resize, and compress your images to the ideal 1200×1200 square format — all from your browser, no uploads required.
Clean product photos sell faster on Vinted. Learn how to remove backgrounds from your clothing photos using AI — entirely in your browser, with no uploads and full privacy.
Learn why real estate agents should watermark property photos, best practices for opacity and placement, and how to batch watermark listings privately in your browser.
Get the optimal photo dimensions, file size, and format for Idealista apartment listings. Learn how to resize, compress, and prepare property images for Spain's largest real estate portal.
Learn the optimal settings to compress photos for WhatsApp so they look sharp after sending. Avoid double compression, keep files under 1MB, and process everything in your browser.
Create compliant passport and ID photos at home for free. Covers US, UK, EU, and Spanish DNI sizes, photo requirements, printing tricks, and why biometric photos should never be uploaded to random servers.
Your iPhone saves photos as HEIC, but the rest of the world wants JPG. Here's how to convert HEIC to JPG for free, directly from your iPhone's browser, with nothing uploaded to any server.
How to add a watermark to your photos for free without signing up or uploading anything. Text and image watermarks, best practices for opacity and placement, and why most free tools aren't truly free.
Blurring faces in photos is legally required in many situations. Learn when, why, and how to do it for free without your photos ever leaving your device.
Create photo collages for Instagram at the correct dimensions, without installing apps, without signing up, and without anyone slapping their watermark on your image.
Create a round profile photo with a transparent background, at the exact size for each platform, without installing anything and without uploading your photo to any server.
Instagram aggressively recompresses your photos if you do not upload them correctly. Learn the real limits for 2026, how to pre-compress with control, and why most online compressors are a privacy risk.
Learn how to add text to your photos directly in the browser, with no sign-ups, no uploads, and no need for Canva or Photoshop.
Learn what the WebP format is, why your computer can't open it, and how to convert it to JPG in seconds without uploading your images to any server.
Combine photos and scanned documents into a single PDF directly in your browser, without your files ever leaving your device.
Learn how to copy text from any image, screenshot, or scanned document with in-browser OCR, without uploading your files to any server.
Convert PDF pages to JPG or PNG images directly in your browser, without your documents ever leaving your device. Free, no sign-up, and no limits.
Decode any QR code you have as an image, screenshot, or in a PDF without installing apps or uploading anything to any server. Fast, private, and right in your browser.
How to rotate or flip an image online for free without uploading it to any server. Fast, private, and free of watermarks or limits.
Fix slightly blurry or soft photos right in your browser, no uploads, no software. A practical guide to sharpening images the right way.
How to fix brightness, contrast, saturation, and color temperature in your photos for free, in your browser, without uploading images anywhere.
Apply grayscale, sepia, vintage and other photo filters online free, with zero uploads. See why browser-based editing beats apps for speed and privacy.
How to pixelate images to censor faces, license plates, or sensitive data, and how to create retro pixel art — without uploading anything to a server.
How to make a meme from any photo without handing your image to a random server. Real tips, common mistakes, and why doing it in the browser wins.
How to turn JPEG into PNG without losing quality or installing anything. Real differences, when you actually need it, and why doing it in-browser is safer.
Learn how to merge PDF files online for free without uploading them to any server. Combine and reorder PDFs 100% in your browser — free, no limits, no watermark.
Generate strong, random passwords right in your browser — nothing ever touches a server. Free, unlimited, no account. Here's why that matters.
Generate SHA-256, SHA-512, SHA-1 and MD5 hashes online, free, with nothing ever uploaded to a server. Verify file integrity in seconds, privately.
Count characters, words and sentences live and check Twitter/X, Instagram, TikTok, LinkedIn and YouTube limits instantly — nothing ever leaves your browser.
Count words, characters, and reading time instantly without uploading your text anywhere. Free, unlimited, and 100% private word counter.
How to switch text between UPPERCASE, lowercase, Title Case, or camelCase without Word tricks or pasting sensitive data into random websites.
Create linear, radial and conic CSS gradients with a live preview. Copy the code instantly, no sign-up, nothing ever uploaded to a server.
Format, validate, and minify JSON online without uploading data anywhere. Free tool, no limits, 100% in-browser processing. Built for devs and API work.
How Base64 actually works, when you really need it, and why encoding it in your browser beats pasting secrets into a random server-side tool.
Generate custom Lorem Ipsum text by paragraphs, sentences, or words, right in your browser. No accounts, no limits, nothing ever uploaded to a server.