How to edit a PDF for free without a watermark

To edit a PDF for free without a watermark, open Kopitiam's Edit PDF tool, drop in your file, make your changes with the toolbar (Text, Cover, Draw, Mark, Image and Sign), then press Download. The file you get back has no watermark, you don't need an account, and there is no charge to save it.

The editing happens in your browser. Your PDF is not uploaded to a server, and once the page has loaded the editor keeps working even if your connection drops. The rest of this guide covers each tool, how to fill in forms, how to change wording that's already printed, and what to do when a file won't cooperate.

Edit a PDF step by step

1. Open Edit PDF and drop your PDF onto the page, or click to choose a file.
2. Wait a moment while Kopitiam checks the file for form fields. If it finds any, they appear as highlighted boxes you can click and type into.
3. Pick a tool from the toolbar. Text adds a new text box, Cover hides existing wording and lets you type over it, Draw is a freehand pen, Mark is a highlighter, Image places a PNG or JPG, and Sign adds a signature.
4. Click or drag on the page to use the tool. Switch back to Select to move anything you've added, or to delete it with the small × button.
5. Made a mistake? Use Undo and Redo in the top bar. The zoom buttons sit next to them if the text is small.
6. Press Download. The edited copy saves to your device with -edited added to the file name, so your original stays untouched.

What each tool in the editor does

• Select: click something you added to pick it up, drag it into place, or remove it.
• Text: click anywhere to drop a text box, then type. Set the Size and Color in the panel on the right before you click, because they apply to the next box you add.
• Cover: drag a box over existing words. Kopitiam lays a cover in a colour you choose (white by default) and opens a text box on top so you can type the replacement.
• Draw: a freehand pen for ticks, arrows or circling something. The Width slider sets the line thickness.
• Mark: a see-through highlighter you drag across text.
• Image: places a PNG or JPG, such as a company stamp or a photo, on the page you're looking at.
• Sign: opens the Add signature window, where you draw or type your signature.
• Auto-fill: looks for fillable fields again if you want to re-run it. It also runs once by itself when you open a file.
• Merge and Pages: add another PDF to the end of this one, or open the page tools to extract, split and reorder.

On a phone the toolbar moves to the bottom of the screen. Text, Draw, Sign and Pages are always there, and More opens the rest, including Select, Cover, Mark, Image, Auto-fill and Merge.

Changing words that are already in the PDF

Most people who search for a PDF editor want to fix something already printed: a wrong date, a misspelt name, an old address. Kopitiam does this with Cover. Choose Cover, drag a box over the old words, and type the new ones into the text box that appears. If the page isn't white, change the Cover colour to match the background so the patch doesn't show.

For example, say a tenancy agreement lists the wrong unit number. Cover the old number, type the right one at a similar size, and download. The replacement uses a plain sans-serif font, so it won't match a fancy typeface exactly, but for a number or a short phrase it reads cleanly.

Cover works best for short fixes. If you need to rewrite whole paragraphs so the lines reflow, a PDF is the wrong format to work in. Convert it to Word with PDF to Word & text, edit it there, and turn it back into a PDF.

Filling in a form

When you open a PDF, Kopitiam looks for places to type. It finds proper fillable fields if the form has them, and it also spots blank lines and boxes next to labels like Name or Date on flat forms. A banner tells you how many fields it added and on which pages, and a counter shows how many you've filled so far.

• Click a highlighted box and type. Boxes split into single-letter cells, like an IC number grid, move to the next cell as you type.
• Click a checkbox to put an X in it. Click again to clear it.
• Use Hide field highlights to see the page as it will print, and Show field highlights to bring the boxes back.
• If a box is in slightly the wrong place, switch to Select and drag it.
• If nothing was detected, use the Text tool to add your own boxes wherever you need them.

Scanned forms have no text for Kopitiam to read. If you press Auto-fill on a scan, it offers Run OCR, which loads a text reader the first time you use it and looks for English labels on the page. The boxes it places are best guesses, so check each one and drag it if needed. Your answers are written onto the page itself, not saved as form-field values.

Working with pages

Each page has its own small bar with Rotate left, Rotate right, Duplicate and Delete page. Deleting asks you to confirm first, and Undo brings the page back. The thumbnail rail on the left lets you drag pages into a new order.

Press Pages to open the page tools. Tap pages to choose them and press Extract to save just those as a new PDF, or tap the scissors between pages and press Split to cut the document into several files. Merge adds another PDF to the end, which is handy when a form and its supporting documents need to go out as one file.

When something goes wrong

• This PDF is password-protected: Kopitiam can't open locked files yet. Open it with the password in your usual PDF reader, use Print and then Save as PDF to make an unlocked copy, and open that copy instead.
• This PDF has editing restrictions: whoever made it blocked changes. The same Print and Save as PDF trick makes an editable copy, as long as you're allowed to change the document.
• The file looks damaged, or isn't a PDF: download it again, or open it in the app that made it and export it as a PDF.
• Your signature or image landed on the wrong page: it goes onto the page you're looking at, so delete it, scroll to the right page and add it again.
• An image or signature is too big or too small: there's no resize handle yet. Images are placed up to about a third of the page width, so crop or shrink the picture before you add it.
• Download fails after typing in another language: the editor fetches an extra font for scripts like Chinese, Korean or Cyrillic. If you're offline at that moment, reconnect and press Download again.

Typed text in Chinese, Japanese, Korean, Greek and Cyrillic stays real, selectable text in the saved PDF. Arabic, Hindi and Thai are drawn as an image so the letters join and order correctly, which means those words can't be selected or searched later.

Why some editors add a watermark

A watermark is a nudge to pay. The tool lets you do the work, then brands the result until you upgrade. Other tools cap how many files you can process a day, or ask you to sign up before the download starts. These are fair business models, but they mean the tool isn't really free for the job you came to do.

Kopitiam pays for its hosting with ads shown beside the tools. There's no watermark, no account and no file-size paywall. After a download it may offer a weekly PDF tip by email, which you can ignore. The code sets no size limit, so the real ceiling is your device's memory: a 200-page scan may be slow on an older phone, and a laptop will cope better.

When Kopitiam isn't the right tool

• You need to edit existing text in place, keeping the original font and letting lines reflow. Kopitiam covers and replaces; it doesn't retype the original words.
• You need a certificate-based digital signature that proves who signed and shows if the file changed afterwards. The Sign tool places an image of your signature, which suits everyday forms but isn't the same thing.
• You need to build a fillable form for other people, with field names and validation. The editor fills forms; it doesn't create them.
• You process hundreds of files at once. Kopitiam works on one document at a time.

For everything else, such as fixing a typo, filling in a form, signing a letter or adding a stamp, open the file, make the change and download it clean.