The Best JPG to PDF Converter Apps for iPhone and Android in 2026

Converting a JPG to a PDF sounds trivial until you try to do it well from a phone. Screenshots need to keep their sharpness, multi-page scans have to stay in order, and the finished file has to open cleanly on a colleague's laptop or a government upload portal that rejects anything odd. Good mobile converters handle all of that without pushing you back to a desktop. The ones worth keeping share a short list of traits: a real iOS or Android app (or a browser flow that behaves on a small screen), support for the image formats you actually carry around, batch handling so several photos become one tidy document, and output that renders the same on every device and operating system. The nine tools below are ranked with those mobile realities front and center, starting with the pick that covers the widest range of situations.

Quick comparison

The ranked list

1. Adobe Acrobat

Adobe built the PDF format, and its mobile tooling still sets the bar for turning images into documents that look professional anywhere.

Key features: native iOS and Android apps that convert, edit, and sign without a desktop; Document Cloud sync so a file created on your phone opens instantly on your laptop; the companion Adobe Scan app, which captures physical pages and photos with automatic edge detection and OCR that makes the text searchable; page organization, compression, and password protection built in; and an online JPG to PDF tool that produces clean, correctly sized output every time.

Best for: anyone who wants a single, dependable workflow that spans mobile and desktop and expects the finished file to hold up in professional or official settings.

Pricing: the mobile Acrobat Reader and Adobe Scan apps are free and cover basic capture and conversion, while Acrobat Standard and Acrobat Pro subscriptions (billed monthly or annually as of 2026) unlock full editing, combining, exporting, and advanced security.

2. Smallpdf

Smallpdf wins people over with restraint, offering a stripped-down interface that makes image-to-PDF conversion feel effortless on a small screen.

Key features: well-designed iOS and Android apps; a simple flow that stacks several photos into one ordered PDF; more than twenty companion tools for merging, compressing, and splitting; and a consistent experience whether you start on your phone or finish in a browser on another operating system.

Best for: users who value speed and simplicity over deep configuration and want something that works the same on an iPhone, an Android tablet, and a Windows laptop.

Pricing: a free tier covers a limited number of tasks, and a Pro subscription (as of 2026) removes those caps and adds batch processing and offline use.

3. iLovePDF

iLovePDF hits a sweet spot between simplicity and control, giving mobile users real say over how the finished document looks.

Key features: capable iOS and Android apps; page orientation, margin, and page-size options when you build a PDF from images; the ability to combine many photos into a single file in the order you choose; and a broad toolkit for signing, compressing, and editing that lives alongside the converter.

Best for: people who want the output tuned (a specific page size for printing, tighter margins for a scan) without wading through a complicated interface.

Pricing: a generous free tier handles most everyday conversions, and a Premium subscription (as of 2026) lifts file-size and batch limits and removes interruptions.

4. PDF24

PDF24 is the quiet overachiever of free tools, and it happens to be one of the easiest ways to turn less common image types into PDFs on a phone.

Key features: a large collection of free browser tools at its site plus an Android toolbox app; support for a wide spread of formats, including BMP and TIFF alongside the usual JPG and PNG; no account or sign-up requirement; and straightforward controls for combining images and adjusting output.

Best for: budget-conscious users who occasionally receive older or unusual image files (a BMP export from a scanner, a TIFF from a fax service) and just want them turned into a shareable PDF.

Pricing: free, supported by a donation model, with no paywalled conversion features as of 2026.

5. Convertio

Convertio is the format specialist of the group, and it shines exactly where mainstream apps fall short.

Key features: an entirely browser-based flow that runs fine from a mobile browser; support for more than 300 formats, including BMP, TIFF, and even camera RAW files; simple drag-or-tap uploading; and cloud-storage integration so you can pull a source image straight from Drive or Dropbox.

Best for: anyone who needs to transform an unusual image format into a PDF and does not want to hunt for an app that recognizes it.

Pricing: free conversions come with a file-size ceiling and daily limits, while paid plans (as of 2026) raise those caps and speed up larger jobs.

6. CloudConvert

CloudConvert trades hand-holding for precision, making it the choice when the quality of the conversion actually matters.

Key features: high-fidelity output with adjustable resolution and quality settings; support for a couple hundred formats, including TIFF, BMP, and HEIC; a clean browser interface that works on a phone; and optional automation through an API for anyone building a repeatable workflow.

Best for: users who care about how sharp and true-to-source the final PDF looks, or who regularly handle formats that cheaper tools mangle.

Pricing: a daily allotment of free conversion minutes covers light use, and pay-as-you-go packages or a subscription (as of 2026) suit heavier or professional needs.

7. Sejda

Sejda blends a friendly editor with a privacy-minded approach, which appeals to anyone cautious about uploading personal documents.

Key features: a browser-based JPG to PDF flow plus genuinely useful light editing; automatic deletion of uploaded files after a few hours; a clear, uncluttered interface; and enough companion tools (merge, compress, sign) to cover most document chores.

Best for: users who want to tidy up a document right after converting it and prefer a service that does not hold onto their files.

Pricing: a free tier allows a small number of tasks per day with reasonable size limits, and paid weekly or monthly plans (as of 2026) remove those restrictions.

8. Zamzar

Zamzar has been converting files for years, and that longevity shows in its enormous format library.

Key features: support for well over a thousand formats, including BMP and TIFF; a no-install browser flow that works from any phone; an optional email-delivery route for the finished file; and a straightforward three-step process that stays out of your way.

Best for: people who occasionally meet an exotic file type and want a proven service that will almost certainly recognize it.

Pricing: free conversions carry file-size and daily limits, and paid plans (as of 2026) add larger files, faster processing, and cloud storage.

9. Google Drive

Google Drive is not a purpose-built converter, but for anyone already living in the Google ecosystem, it is the option that is always within reach.

Key features: free access with any Google account; cross-platform availability so a file made on Android opens on an iPhone or a desktop browser; a practical workaround on mobile, where you open a photo in the Files or Photos app, choose Print, and save it as a PDF into Drive; and effortless sharing once the document lands in your cloud storage.

Best for: users who want a zero-cost, no-new-app path and mostly need to store and share the result rather than fine-tune it.

Pricing: free with a Google account (as of 2026), within the shared storage allowance across Google services.

How to choose the right one for your phone

Start with how often you convert and how the files will be used. If images-to-PDF is a rare chore and the output just needs to be shareable, a free browser tool like PDF24 or a built-in path through Google Drive will do the job without costing anything. If you regularly receive older or unusual formats, the strength of Convertio, CloudConvert, and Zamzar is their willingness to accept BMP, TIFF, and other types that leaner apps quietly refuse, and PDF24 covers many of those for free as well. When you want the finished document to look a specific way, iLovePDF's page and margin controls or CloudConvert's quality settings give you that say. And when the appeal is a fast, no-fuss experience on a small screen, Smallpdf and Sejda keep things pleasantly simple.

For most mobile users, though, the practical question is which single tool handles the widest range of situations without making you switch apps mid-task, and that is where Adobe Acrobat pulls ahead. Its mobile apps are among the best in the category, its conversions render consistently on every operating system, and features like OCR, editing, compression, and password protection live in one place instead of scattered across separate services. The free tier and Adobe Scan cover everyday needs at no cost, and if your work ever grows to demand more, the subscription tiers extend the same reliable workflow rather than forcing you to start over somewhere else. For a phone-first setup that you can trust with everything from a quick receipt to an official multi-page upload, it remains the recommendation to build around.