Guides
How-To Articles
Practical guides for working with PDFs, images, and audio — from compressing files to converting formats.
How to Compress a PDF (Reduce PDF File Size)
How to shrink a PDF so it fits an email or upload limit, without turning the text into a blurry image. Covers why PDFs get large, what actually reduces the size, and a free step-by-step method that runs in your browser.
How to Convert HEIC to JPG
Convert iPhone HEIC photos to JPG in your browser — free, no upload, works on Windows and Android. Step-by-step.
PNG vs JPG vs WebP vs AVIF: Which Format Should You Use?
A plain-English guide to PNG, JPG, WebP, and AVIF — what each is best at, and which to pick for photos, graphics, and the web.
How to Remove an Image Background Without Uploading It
Remove a photo's background in your browser — the AI runs locally, so your image is never uploaded. Free, no sign-up.
How to Make an Image Background Transparent
A plain-English guide to making any image background transparent and saving a transparent PNG — for logos, photos, and graphics. Free, in-browser, no upload, no account. Includes a comparison of every common method.
How to Merge PDFs With Different Page Sizes
Combine PDFs with mismatched page sizes into one tidy document — standardize to A4 or Letter in your browser, free and private.
PNG vs JPG: Why Your Transparent Background Turns White
You removed the background, then it came back as solid white. Here is exactly why — PNG vs JPG, alpha channels, and how to save a file that actually stays transparent.
How to Make an Image Transparent for PowerPoint & Google Slides
Step-by-step: remove an image background, save it correctly, and insert a transparent PNG into PowerPoint or Google Slides without a white box appearing behind it.
How to Make a Logo Background Transparent
Remove the white or coloured box behind a logo and get a clean transparent PNG — covers flat-colour edge detection, vector alternatives, and the mistakes specific to logos.
How to Make a Signature Transparent for Documents
Turn a photographed or scanned signature into a transparent PNG — no white box around your name when you paste it into a Word document, PDF, or contract.
How to Convert WAV to MP3
Why and when to convert WAV to MP3, what you actually lose in the process, and a step-by-step walkthrough using a free in-browser converter. No upload required.
How to Compress Audio Files (Reduce File Size)
How to shrink audio file size without ruining it — what "compression" actually means for audio, which format to pick, and a step-by-step walkthrough using a free in-browser tool.
How to Remove Vocals From a Song (Make a Karaoke Track)
Turn any song into a karaoke track or extract an acapella using AI stem separation — free, in your browser, no upload. Covers how it works, what to expect, and the limits.
Best Audio Format for Quality vs. Size: MP3 vs WAV vs FLAC vs AAC vs OGG
A plain-English comparison of MP3, WAV, FLAC, AAC, and OGG — what each is actually for, honest trade-offs between quality and file size, and which to pick for your situation.
How to Change Audio Speed Without Changing Pitch
Speed up or slow down a recording without it sounding like a chipmunk or a tape running slow — how pitch-preserving time-stretching works, and a step-by-step guide using a free in-browser tool.
How to Merge PDF Files (Combine PDFs Into One)
How to combine several PDFs into a single document, in the order you want, without Acrobat and without uploading anything. Covers page order, mixed page sizes, file size, and the limits worth knowing.
How to Password Protect a PDF (Without Uploading It)
How to add a password and AES-256 encryption to a PDF entirely on your own machine. Covers user vs owner passwords, what encryption really protects, and why uploading a confidential file to encrypt it defeats the point.
How to Fill Out a PDF Form
How to fill in a PDF form online without Acrobat, what makes a PDF fillable in the first place, what to do when the fields will not accept typing, and whether to flatten before you send it.
How to Convert a PDF to JPG
How to turn PDF pages into JPG or PNG images at the right resolution, including single pages, whole documents, and batches. Covers DPI, JPG vs PNG, avoiding blurry output, and how to go back again.