Why people need to merge JPGs into a PDF
When you scan a multi-page document with your phone, each page is saved as a separate JPEG. Sharing ten separate image files is unwieldy — a single merged PDF is easier to email, store, and print. Similarly, some official forms require you to submit a single PDF containing multiple photos (front and back of an ID, multiple supporting documents). Combining JPGs into one PDF solves both problems.
How to combine JPG files into a PDF with MiniFiles
- Open minifiles.io and select the Merge tab. 2. Drag and drop your JPG files onto the upload zone (PNG, WebP and GIF images work too, and you can mix them with existing PDFs). 3. Arrange the order: drag files in the file view, or switch to the page view to drag, rotate or delete individual pages. 4. Click the button to build the PDF. 5. Download the result — merged.pdf, or <image name>.pdf if you added a single image. Each image becomes one page sized to the image (the longest side is scaled to at most A4 height), the photo is kept at full resolution and its EXIF orientation is applied, so phone photos appear the right way up. Everything runs in your browser; no upload occurs.
Compressing the result
A PDF created from multiple JPEGs can be large if the source images are high-resolution smartphone photos. Once you have the PDF, use MiniFiles' PDF compression to reduce its size. The compression targets the embedded images, reducing their resolution and re-encoding them at the selected quality level. A 20-page PDF from 8 MB smartphone photos (160 MB total) can typically be reduced to under 10 MB using the Balanced preset, and under 5 MB using the Maximum preset (Pro) — without the text or document content becoming unreadable.
Privacy when converting scanned documents
Scanned documents — passports, driving licences, utility bills, bank statements — contain highly sensitive personal data. Uploading these to a server-based JPG-to-PDF converter means a third party receives your personal data. Under GDPR, this constitutes a data transfer to a processor and requires a Data Processing Agreement. Building the PDF in MiniFiles, which runs in your browser, keeps every step — combining, compressing and password-protecting — on your device.
Alternatives to MiniFiles for merging JPG to PDF
iLovePDF JPG to PDF: server-based upload, free tier available, but files go to iLovePDF's servers. Smallpdf: server-based, files uploaded to Swiss servers. Adobe online: requires Adobe account, server-based. macOS Preview: built-in, local, free — select the JPGs in Finder, open them in Preview, arrange the thumbnails, then choose File → Print → Save as PDF. Microsoft Print to PDF: on Windows, select the JPGs in File Explorer, right-click → Print and choose the Microsoft PDF printer — local, free. MiniFiles: local, free, works in any modern browser, and can also merge the images with existing PDFs in the same step.
Merging JPG to PDF on a phone
MiniFiles works in mobile browsers too: open minifiles.io in Safari on iPhone or Chrome on Android, go to the Merge tab, select the photos and save them as one PDF — processed locally on your phone. iPhone photos in HEIC format are not supported, so pick JPEG images or set Settings → Camera → Formats to 'Most Compatible'. Built-in alternatives: on iPhone, the Print → Save as PDF trick in the Photos app, or scanning the document with the Notes or Files app; on Android, many gallery apps and Google Drive's scanner can produce a PDF from photos.