User Guide

New here? These step-by-step guides will help you get the most out of every free tool on niDar Tools.

🖼️ Image Resizer & Compressor

Resize a photo to an exact size and file size — great for passport/ID photos.

  1. Open Image Resizer and upload your photo.
  2. Choose a unit (px/cm/mm/in) and enter your target width and height.
  3. Turn off "Maintain aspect ratio" if you need an exact custom size (like 3.5×4.5 cm for a passport photo) that's different from your photo's original shape.
  4. Set your target file size (KB/MB) and pick the output format (JPEG or PNG).
  5. Optional: turn on "Add a solid background" to fill empty space with a colour, or "Smart Background Change (AI)" to replace the real background behind a person.
  6. Tap Resize & Compress, then Download File.

🔄 Image Format Converter

Convert images between JPG, PNG, and WebP formats directly in your browser.

  1. Open Image Format Converter and select an image from your device.
  2. Choose the output format: JPG, PNG, or WebP.
  3. Tap Convert to convert the image in your browser.
  4. Check the converted file size shown in the result section.
  5. Tap Download File to save the converted image.

Privacy: Your image is processed locally in your browser and is not uploaded to a server.

📄 Image to PDF Converter

Combine one or more photos into a single PDF file.

  1. Open Image to PDF and upload one or more photos.
  2. Use the ▲ ▼ buttons to reorder the photos — this is the order they'll appear in the PDF.
  3. Choose page size (A4 / Letter / Fit to Image), orientation, and margin.
  4. Tap Generate PDF, then Download PDF.

🎂 Age Calculator

Find your exact age in years, months and days.

  1. Open Age Calculator.
  2. Enter your date of birth.
  3. (Optional) Change the "To Date" field if you want your age as of a different date.
  4. Tap Calculate Age to see your exact age, total days/weeks/months, and days left to your next birthday.

🔳 QR Code Generator

Create a QR code for any link or text.

  1. Open QR Generator.
  2. Type or paste your link/text.
  3. Choose a size and colour.
  4. Tap Generate QR Code, then Download PNG.
  5. To test it: open a camera app on another phone and point it at the QR code, or use Google Lens on the downloaded image.

🧩 Favicon & Icon Kit Generator

Turn one logo/image into a complete website icon set.

  1. Open Icon Kit Generator and upload your logo.
  2. If your logo has a plain/solid background you want removed, turn on "Remove background".
  3. Tap Generate Icon Kit.
  4. Tap Download ZIP — it includes favicon.ico and all standard icon sizes, ready to use on any website.

🪄 Background Remover

Remove the background from any photo instantly, free, with no watermark.

  1. Open Background Remover and upload your photo.
  2. Wait a few seconds while the tool processes the image in your browser (first use may take slightly longer as the AI model loads).
  3. Compare the original and background-removed preview side by side.
  4. Tap Download PNG to save your image with a transparent background.

Privacy: Your photo is processed locally in your browser using on-device AI — it is never uploaded to a server.

📃 Word to PDF Converter

Convert a Word (.docx) document into a PDF file.

  1. Open Word to PDF and upload your .docx file.
  2. Wait a few seconds while the tool renders a preview in your browser.
  3. Review the preview carefully — check headings, paragraphs, and any tables.
  4. Tap Download PDF to save the converted file.

Note: Only .docx files are supported. If you have an older .doc file, re-save it as .docx in Word first.

📝 PDF to Word Converter

Convert a PDF file into an editable Word (.docx) document.

  1. Open PDF to Word and upload your PDF file.
  2. Wait a few seconds while the text is extracted and shown in a preview.
  3. Review the extracted text — this tool converts text content, not exact layout.
  4. Tap Download Word (.docx) to save the file.

Note: This works best with text-based PDFs. Scanned PDFs (images of text) will not convert accurately.

Need more help?

Check our FAQ page, or reach out any time at [email protected].