Guides & Explainers — Page 5
Practical articles on image compression, PDF workflows, developer tools, and more. Written by Hasanur Rahman — the developer who built the tools.
Showing 81–94 of 94 articles
How to Remove an Image Background Free Online
A clean cut-out on a transparent background makes product photos look professional, profile pictures stand out, and design projects easier to assemble. You do not need Photoshop or a paid subscription. Modern AI runs in the browser and removes backgrounds from photos in one click — with your image staying on your device the entire time.
Read article →How to Add a Password to a PDF Free
Adding a password to a PDF before sharing it is a simple way to keep sensitive content private. Only someone with the password can open the document. You can also restrict what recipients can do with it — like preventing them from printing or copying text. All of this is free and takes under a minute.
Read article →How to Encode and Decode URLs Online Free
URLs can only contain a limited set of characters. Spaces, non-ASCII characters, and many punctuation marks need to be encoded before they're safe to use in a URL. URL encoding — also called percent encoding — replaces those characters with a % sign followed by their hexadecimal code. This guide explains why encoding is necessary and how to encode or decode any URL instantly.
Read article →How to Remove a Password from a PDF Free
If you have a password-protected PDF that you own and you're tired of entering the password every time, or you need to edit and convert the file, removing the password is straightforward. You just need to know the current password to do it — these tools don't crack encryption, they simply re-save the document without the protection.
Read article →JPG vs PNG vs WebP — Which Format Should You Use?
Choosing between JPG, PNG, and WebP is not about picking a winner. Each format was built for different content. Use the wrong one and you either waste bandwidth or get ugly artifacts around text and logos. This guide gives you a clear rule set so you can choose in seconds.
Read article →How to Convert JPG to PDF Online Free
Turning JPG images into a PDF is handy when you need to send multiple photos as a single document, create a simple portfolio, or prepare scanned pages for sharing. You can convert one photo or combine dozens into a single PDF — all for free, right in your browser.
Read article →What Is Regex and How to Use It — A Beginner's Guide
Regular expressions — usually shortened to regex or regexp — are patterns used to search, match, and manipulate text. They look intimidating at first: a string like ^[\w.-]+@[\w-]+\.[a-z]{2,}$ can seem like noise. But once you understand the building blocks, regex becomes one of the most powerful tools in any developer's toolkit. This guide explains how it works from scratch.
Read article →How to Convert PDF to JPG Online Free
Converting a PDF to JPG turns each page into a separate image file. This is useful when you need to share a page as an image, use a page as a slide background, or display document content on a website without embedding the full PDF. You can do it for free in your browser with no account needed.
Read article →How to Compress an Image Without Losing Quality
Compressing an image usually means making the file smaller. The fear is that smaller always means blurrier. That does not have to be true. When you compress an image the right way — resize to the display size, choose the correct format, and use moderate quality settings — you can cut file size by 60—80% with no visible difference on a phone or laptop screen.
Read article →How to Compress a PDF Without Losing Quality
A large PDF is inconvenient to email, slow to upload, and frustrating to download. Compressing it reduces the file size, but many people worry about degrading the content in the process. The good news is that for most PDFs, significant size reduction is possible with no visible quality difference — you just need to understand what's actually being compressed.
Read article →How to Split a PDF into Multiple Files Free
Sometimes you only need one chapter from a 200-page report, or you want to share a single page from a multi-page document without handing over the entire file. Splitting a PDF is the answer. You can do it for free in your browser without signing up for anything or sending your document to a cloud server.
Read article →Best Free Image Tools Online in 2026
Finding a good image tool online shouldn't mean handing your photos over to a random server, sitting through upload queues, or hitting a paywall after two free conversions. The tools in this guide run entirely in your browser, which means your files stay on your device from start to finish. No account required, no subscription, no surprises.
Read article →How to Format and Validate JSON Online
JSON is the default language of the web. APIs return it, config files use it, and databases store it. But raw JSON — especially a minified blob from an API response — is nearly impossible to read at a glance. Formatting it adds indentation and line breaks that make the structure obvious. This guide covers how to format and validate JSON online in seconds, what the common errors mean, and why it matters.
Read article →How to Merge PDF Files Free Online
Merging PDFs is one of the most common document tasks out there — combining a contract with its addendum, joining scanned pages into a single file, or assembling a report from multiple sources. You can do it for free, directly in your browser, without uploading your files anywhere. Here's how.
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