Apps > PDF Converter > FAQ

[Common] Should I grant file access permissions to the app?

Yes, PDF Converter app needs file access permissions to READ and WRITE files. Tap "Allow" when a notification is popped up to ask for permission like "Allow PDF Converter to access photos, media, and files on your device?". The app may not show notification again if the permission was rejected twice on some phones. If this happens, you can change permissions in your phone's Settings. Here are steps that work on Android 11 and up: 1) Open the "Settings" app. 2) Tap "Apps & notifications". 3) Tap "PDF Converter" app. 4) Tap "Permissions". 5) Tap "Files and media". 6) Tap "Allow management of all files".

[Common] Where is the output PDF file saved?

The output PDF file is usually saved in the "Download" folder in external storage by default. It's usually displayed as "/storage/emulated/0/Download/", "/mnt/sdcard/Download/", "/sdcard/Download/", "/storage/emulated/Download/", etc.

[Common] How can I send output PDF file to others?

Tap the "Output Files" menu, tap on the file you want to send, then tap on the "Share File" pop menu, choose an app such as Gmail, WhatsApp or Facebook to send the file.

[JPG to PDF] Why can't I find my images in image chooser?

Your images may not be indexed in MediaStore (MediaStore provides an indexed collection of common media types, such as Audio, Video, and Images, from any attached storage devices in your phone.) yet. Try opening your images in Gallery/Photos app once, this will make the images indexed.

[JPG to PDF] How can I choose other image formats such as BMP, GIF or WEBP?

The default image chooser only lists JPG and PNG images for you to choose. To choose other image formats such as BMP, GIF or WEBP: Tap the "FOLDER" button, select the image folder and tap the "CHOOSE" button. It will add all supported image formats in this folder to the conversion queue.

[JPG to PDF] How to sort images?

Tap the "SORT" button to open a new form. In this form you can drag and drop to change image order or tap menu to sort image files in order of file name, last modification date, file size or numbers in file name. You can tap on an image file to view it with the default image viewer. To remove an image file from list, pull it to the left and tap the "" icon.

[JPG to PDF] How to reduce output PDF file size?

Tap the switch next to "Image Compression" to enable image compression and set image quality. Image quality ranges from 1 to 100. 1 meaning compress for small size, 100 meaning compress for max quality. Some formats, like PNG which is lossless, will ignore the quality setting.

[JPG to PDF] Why does the image look bad in PDF?

The image in PDF is actually the same as the image before conversion if compression is not enabled and resampling is not triggered. However, PDF reader apps need to zoom PDF pages to fit the phone screen while displaying it, images in PDF may look blurry or pixelated after zooming.

[PDF to JPG] Why does the output image look fuzzy?

PDF Converter creates high quality and high resolution images if using default settings, however some image viewer apps may show image thumbnail only or make image fuzzy while zooming image to fit phone screen. We recommend using the Gallery or Photos app to view output images: close PDF to JPG Converter app first, open your Gallery or Photos app, then find the output image and tap on it to view it.

[PDF to JPG] Why does the image look fuzzy after sending by WhatsApp?

Some apps may use a rather aggressive compression when sending images. You need to send images in original quality. Use WhatsApp as example: 1: Rename the JPG image by changing the file extension to .doc. 2: Send the "camouflaged" document to your WhatsApp contact. 3: Your contact will have to do the reverse: download the file, open a file manager and change the extension to .jpg.

[PDF to JPG] What is rendering DPI?

DPI specifies the image horizontal and vertical resolution in pixels per inch. The higher DPI value the higher image resolution. Default 300 DPI is a minimum standard resolution for document and photo printing. You can set a higher value such as 600 DPI or 900 DPI.

[PDF to JPG] How to reduce output image file size?

Set rendering DPI or image quality to a smaller value. For example: you can set rendering DPI to 72 and image quality to 85 if the output images are only for displaying on phone. Changing the output format to WEBP may have a better compression ratio for some PDF files.

[PDF to JPG] How can I convert PDF to one single image so it's easier to be shared?

Change "Conversion Type" option to "PDF to one single image". Each PDF page will be displayed behind the previous page. We don't recommend changing this option for PDF files which have more than ten pages.

[PDF Tools] How can I rearrange PDF pages?

The PDF splitter function can also be used to rearrange PDF pages. Set "Action" to "SPLIT PDF" and enter the new PDF page order in "PDF Pages" section to arrange PDF pages. For example: If you want rearrange a 5-page PDF to new order as "page 3, page 5, page 1, page 4, page 2", just enter text "3,5,1,4,2" to the "PDF Pages" section, then tap the "SUBMIT" button.

[PDF Tools] What is PDF user password and owner password?

PDF User Password: It is also called PDF Document Open Password, which is the password used to prevent people from opening or viewing a PDF document. Once the User Password is set, in order to open the PDF document Adobe Acrobat/Reader will prompt a user to enter this password. If it is not correct, the document will not open.

PDF Owner Password: It is also known as PDF permissions password or PDF master password, which is the password used to set PDF document restrictions, which can include printing, content copying, editing, page extracting, commenting, etc. Once the owner password is set, Acrobat will require this password if you want to make any changes to the PDF document.

[PDF Tools] What kind of PDF passwords should I enter to unlock PDF?

You can leave the password blank if the PDF file is secured by the owner password. You can enter either user password or owner password to unlock the PDF file if the PDF is secured by user password.

[PDF Tools] How to make PDF be viewed in "dark mode"?

Set "Action" to "INVERT PDF", then tap the "SUBMIT" button to invert colors in PDF files.

[PDF Tools] Why is the PDF file size not reduced after compression?

The PDF file may be compressed before or has lower quality than settings. For example, changing image quality to 60 will not reduce file size if the original image quality is 60 or lower. You can try entering a smaller quality value such as 40 if this happens.