Complete guide to converting files on iPhone and Android. Covers native conversion features, browser-based tools, recommended apps, share sheet integration, and mobile storage management.
There was a time when converting file formats required a desktop computer with specialized software. That time is over. Modern smartphones are powerful enough to handle the vast majority of file conversions, from resizing images and converting videos to transforming documents and compressing PDFs.
Whether you are converting a HEIC photo to JPEG to share with a colleague, turning a Word document into a PDF for a client, or extracting audio from a video for your podcast, your phone can handle it. The question is which approach to use: native OS features, browser-based tools, or dedicated apps.
This guide covers all three approaches for both iOS and Android, with specific recommendations for every common conversion scenario.
Apple has built several conversion capabilities directly into iOS. These work without installing any additional apps.
iPhones capture photos in HEIC format by default, which offers better quality at smaller file sizes than JPEG. But HEIC is not universally supported, especially on older Windows computers and some web platforms.
iOS handles this automatically in most cases:
To always shoot in JPEG instead of HEIC: go to Settings > Camera > Formats and select Most Compatible.
For more details on the HEIC format and manual conversion options, see our guide on converting HEIC to JPG and our HEIC format explainer.
The Files app in iOS supports basic conversions:
Apple's Shortcuts app is the most powerful native conversion tool on iOS. Pre-built shortcuts and custom automations can handle complex conversions:
Useful pre-built shortcuts:
Example: Batch image conversion shortcut
| Conversion | Method | Quality | Ease |
|---|---|---|---|
| HEIC to JPEG | Automatic on share | Excellent | Effortless |
| Image format change | Files app or Shortcuts | Good | Easy |
| Any document to PDF | Print > Pinch to PDF | Good | Easy |
| Live Photo to GIF | Shortcuts | Good | Moderate |
| Video to audio | Shortcuts | Good | Moderate |
| Video format conversion | Not natively supported | N/A | N/A |
| Batch image resize | Shortcuts | Good | Moderate (setup) |
Pro Tip: The iOS "Print to PDF" trick works with almost any file that can be printed. Open the file, tap Share > Print, then pinch-zoom on the print preview with two fingers. iOS creates a PDF that you can then share or save to Files. This works with web pages, emails, documents, and even some app content.
Android's open architecture gives it different native capabilities than iOS.
Samsung Galaxy devices include additional conversion tools:
The Google Docs mobile app can open and convert Office documents:
| Conversion | Method | Quality | Ease |
|---|---|---|---|
| HEIC to JPEG | Google Photos export | Good | Easy |
| Document to PDF | Google Docs > Save as PDF | Good | Easy |
| Spreadsheet to PDF | Google Sheets > Save as PDF | Good | Easy |
| Image compression | Google Files | Moderate | Easy |
| Video format change | Not natively supported | N/A | N/A |
| Audio extraction | Not natively supported | N/A | N/A |
| Batch processing | Limited | Varies | Moderate |
The most versatile approach to mobile file conversion is using browser-based tools. They work on both iOS and Android, require no app installation, and handle formats that native tools cannot.
Our tools are fully optimized for mobile browsers:
| Advantage | Details |
|---|---|
| No installation | Works immediately in any browser |
| No storage usage | No app taking up device space |
| Always current | No updates to install |
| Cross-platform | Same tool on iOS, Android, desktop |
| Wide format support | Hundreds of format combinations |
| Privacy options | Files can be processed and deleted automatically |
Pro Tip: Before converting large files on mobile, connect to WiFi to avoid consuming your mobile data allowance. A 5-minute 1080p video can be 500 MB or more, which would make a significant dent in most mobile data plans.
When you need offline conversion or handle files frequently, a dedicated app is the best option.
Documents by Readdle (Free) A comprehensive file manager with built-in conversion:
VLC (Free) The legendary media player also handles conversion:
PDF Expert (Paid) The gold standard for PDF work on iOS:
File Converter (Free, Open Source) A lightweight, ad-free converter that integrates with the Android Share Sheet:
VLC for Android (Free) Same powerful media handling as the iOS version:
Adobe Acrobat Reader (Free) PDF operations on Android:
| Feature | Documents (iOS) | File Converter (Android) | VLC (Both) | Adobe Acrobat (Both) |
|---|---|---|---|---|
| Image conversion | Yes | Yes | No | No |
| Video conversion | No | Yes | Yes | No |
| Audio conversion | No | Yes | Yes | No |
| PDF creation | Yes | Yes (from images) | No | Yes |
| PDF editing | Basic | No | No | Yes |
| Document conversion | Limited | No | No | PDF export |
| Offline support | Yes | Yes | Yes | Partial |
| Price | Free | Free | Free | Free (basic) |
| Ads | No | No | No | No |
Both iOS and Android support Share Sheet integration, which lets you convert files without opening a separate app.
To add a Shortcuts conversion to your Share Sheet:
Apps like File Converter are designed specifically for Share Sheet integration. They appear as conversion options whenever you share a compatible file type, making the workflow nearly seamless.
HEIC photos from your iPhone may not display correctly when emailed to Windows users or uploaded to older web platforms.
Quick method:
For more control:
You receive a DOCX file and need to send it as a PDF immediately.
On iOS:
On Android:
Browser method (both platforms):
You recorded a lecture or interview on video and want just the audio.
Using VLC (both platforms):
Browser method:
Video files are often too large to send via messaging apps.
On iOS:
Browser method (both platforms):
You need to combine several photos of a document, whiteboard, or receipt into a single PDF.
On iOS (Files app):
On Android (Google Drive):
File conversion often intersects with storage management, especially on devices with limited space.
| Strategy | iOS | Android |
|---|---|---|
| Delete originals after conversion | Manual (Files app) | Manual (file manager) |
| Offload unused apps | Settings > General > iPhone Storage | Settings > Storage > Free up space |
| Cloud backup before deleting | iCloud, Google Drive | Google Drive, cloud apps |
| Clear conversion cache | Settings > [App] > Clear Cache | Settings > Apps > [App] > Storage |
| Use streaming conversion | Browser tools (no local file) | Browser tools (no local file) |
Before converting large files (especially video), check your available storage:
If space is tight, use a browser-based converter like our video converter or image converter. The conversion happens in the cloud, so you only need space for the output file, not both the input and output simultaneously.
Keep your browser open. If using a browser-based tool, switching to another app or letting your phone lock may interrupt the conversion. Some browsers pause background tabs.
Use WiFi for large files. Video conversions can involve hundreds of megabytes of upload and download. WiFi is faster, more reliable, and does not consume mobile data.
Check the output before deleting the original. Always verify that the converted file is correct (plays properly, looks right, opens without errors) before deleting the source file.
Use the right quality setting. Higher quality means larger files. For sharing via messaging apps, medium quality is usually sufficient. For archival or professional use, keep maximum quality.
Batch when possible. If you need to convert multiple files, use a tool or app that supports batch processing rather than converting one file at a time. Our batch processing guide covers strategies for efficient multi-file operations.
Mind your battery. Video conversion is CPU-intensive and will drain your battery faster than normal use. Plug in or ensure you have sufficient charge before starting a large conversion.
Consider privacy. When using online conversion tools, your files are uploaded to a server. For sensitive documents, use an offline app or our privacy-focused converter that deletes files after processing. Our guide on data privacy in file conversion covers this topic in depth.
| Capability | iOS (Native) | Android (Native) | Browser Tools | Dedicated Apps |
|---|---|---|---|---|
| Image format conversion | Good (Files + Shortcuts) | Limited (Google Photos) | Excellent | Excellent |
| Video conversion | Limited (Shortcuts) | Not supported | Excellent | Good (VLC) |
| Audio conversion | Limited (Shortcuts) | Not supported | Excellent | Good |
| Document to PDF | Good (Print trick) | Good (Google Docs) | Excellent | Good |
| PDF operations | Basic | Basic (Google Drive) | Excellent | Excellent |
| Batch processing | Shortcuts | Limited | Depends on tool | App-dependent |
| Offline support | Yes | Yes | No | Yes |
| Ease of use | Easy-Moderate | Easy | Easy | Varies |
The best approach depends on your specific needs. For occasional conversions, browser-based tools provide the broadest format support without any setup. For frequent conversions, a dedicated app with Share Sheet integration makes the process seamless. And for simple format changes like HEIC to JPEG, your phone's built-in features often handle it automatically.
Whichever method you choose, the days of needing a desktop computer for file conversion are firmly in the past.
Sarah Chen
Technical writer specializing in multimedia formats and digital workflows. Covers file conversion, video encoding, and document processing.
