Practical guides for image, PDF, audio and video tasks. Choose a topic, then open the matching tool from any guide.
Compress a JPG, PNG or WebP to a 200 KB limit without uploading. Start with the preset, check a measured example, and learn when resizing is needed.
Send photos that arrive quickly and open everywhere: sensible dimensions and quality for email, chat apps and forms, plus how to handle a whole batch.
Why downscaling is safe and upscaling is not, which resize modes keep proportions, how to set exact dimensions, and how to keep sharpness after resizing.
Instagram, Facebook, X and LinkedIn image sizes and aspect ratios for posts, profiles and banners in 2026, and how to export every size from one photo.
Make a circular avatar that stays round anywhere: choose a square crop, export a transparent PNG, and know when a plain square is the better upload.
Produce an image that is exactly the size a form, listing or template demands, with the subject where you want it, using ratio locks and fill modes.
HEIC, AVIF and WebP explained without jargon: what each is good at, where it fails to open, and a simple rule for which to keep, share or publish.
Cut out a person, pet or product on your own device, save a transparent PNG or a white background, and know when the edges need a second look.
Why PDFs grow, which level to pick for email, portals and print, how to hit a limit such as 1 MB, and what to do when a scan will not shrink — no upload.
Why a viewer’s rotate button does not stick, how to fix a sideways scan for good, what to do when every second page is upside down — no upload.
Password-protect a PDF locally with AES-256. Follow four steps, try a sample, and compare an open password with printing or copying restrictions.
Draw, type or upload a signature and place it on a PDF without uploading it, add a date and initials, and know when an electronic signature is enough.
Cut an MP3, WAV or voice memo to the part you need, remove a cough, add fades and bring the level up without distortion, all in your browser.