Capture Full Webpage Screenshot on Mobile
& Convert WebP to JPG (Step-by-Step Guide)
Two common problems: capturing an entire webpage that won't fit on one screen, and dealing with WebP images that won't upload anywhere.
This guide solves both. Learn how to take scrolling screenshots on iPhone and Android to capture full articles, receipts, or designs. Then convert those WebP images (the format websites love but apps hate) to universal JPG format. No computer needed [citation:2][citation:9].
Part 1: Capture Full Webpage Screenshots on Mobile
| Platform | Method | Output | Pros | Cons |
|---|---|---|---|---|
| iPhone (Built-in Safari) | Take screenshot, tap thumbnail, select 'Full Page' tab | PDF (not JPG) | No app needed, built-in | |
| iPhone (WebCapture app) | Paste URL, capture full page automatically | Image file (JPG/PNG) | Saves to Photos, dark mode support | |
| Android (Scroll Capture) | Paste URL, tap capture, scroll to bottom | Long JPG image | Free, adjustable quality up to 100% | Contains app sticker (removed with login) [citation:9] |
📱 iPhone: Built-in Safari Method (Free, No App)
Note: This saves as PDF, not JPG. If you need an image file, use the WebCapture app method below [citation:3][citation:7].
📱 iPhone: WebCapture App (For JPG/PNG Output)
WebCapture is a dedicated app for full-page screenshots that saves directly to Photos as images [citation:3][citation:7].
iOS 26 compatible: Latest update adds Liquid Glass icon and dark mode support [citation:3][citation:7].
📱 Android: Scroll Capture App (Free, High Quality)
Scroll Capture (4.5 stars, 1.44K reviews) is the top-rated app for long screenshots on Android [citation:9].
Pro tip: In settings, set quality to 100% for crystal clear HD images. Login to remove app sticker from captured images [citation:9].
Part 2: Convert WebP to JPG on Mobile
Why WebP? WebP is Google's modern format that makes files 25-34% smaller than JPG with same quality. Websites use it for speed, but many apps still need JPG [citation:2].
iPhone (iOS 16+)
Files app → Long press → Quick Actions → Convert Image → JPG
Save WebP to Files, long press, select Convert Image, choose JPG [citation:2]
Built-in, no apps needed
Android
Google Photos → Edit → Any edit → Save copy
Open in Google Photos, make minor edit (crop or 0% filter), save copy – converts to JPG automatically [citation:2]
Trick works for JPG output
Android (PNG conversion)
Image Converter app from Play Store
Select WebP, choose PNG output, convert [citation:2]
For PNG format specifically
Windows PC
Microsoft Paint
Open in Paint, File → Save as → JPEG picture [citation:2]
Built-in, works offline
Mac
Preview
Open in Preview, File → Export, choose JPEG format [citation:2]
Built-in, works offline
Any device (online)
CloudConvert or GroupDocs
Upload WebP, select JPG output, download [citation:6][citation:10]
Files deleted after 24 hours [citation:6]
🔄 iPhone: Convert WebP to JPG (Built-in, No Apps)
Works on iOS 16 and higher using the Files app [citation:2].
🔄 Android: Convert WebP to JPG (Using Google Photos Trick)
Clever trick: Google Photos converts edited images to JPG automatically [citation:2].
For PNG conversion: Use Image Converter app from Play Store [citation:2].
💻 Desktop Methods (Paint & Preview)
Windows: Microsoft Paint
Right-click WebP → Open with Paint → File → Save as → JPEG picture [citation:2]
Built-in, works offline
Mac: Preview
Open in Preview → File → Export → Format: JPEG [citation:2]
Built-in, works offline
🌐 Online WebP to JPG Converters (Any Device)
No software? Use online converters like GroupDocs or CloudConvert [citation:6][citation:10].
Privacy: Files deleted after 24 hours, encrypted in transit [citation:6][citation:10].
Questions People Actually Ask
How do I capture a full webpage screenshot on iPhone without an app?
Use Safari's built-in feature: Take a regular screenshot (side button + volume up). Tap the thumbnail that appears in the corner. Select the 'Full Page' tab at the top. You'll see a preview of the entire page. Tap 'Done' and choose 'Save PDF to Files'. Note: This saves as PDF, not JPG. For JPG output, you'll need a third-party app like WebCapture [citation:3][citation:7].
What's the best app for full webpage screenshots on Android?
Scroll Capture is highly rated (4.5 stars, 1.44K reviews). Paste the URL in the app's browser, tap the capture icon at the top, scroll to bottom, tap capture again. It saves a long JPG to your gallery. Set quality to 100% in settings for crystal clear HD images [citation:9]. Free with optional login to remove app sticker.
Why do some websites save as WebP instead of JPG?
WebP is Google's modern image format that makes files 25-34% smaller than JPG while maintaining the same quality. Websites use it to load faster and save bandwidth. However, some apps and platforms don't support WebP yet, so conversion is still needed [citation:2].
How do I convert WebP to JPG on iPhone without any apps?
If you have iOS 16 or higher, use the Files app: Save the WebP image to Files (from Photos, tap share icon → Save to Files). Navigate to the file in Files app, long press on it, select 'Quick Actions', then choose 'Convert Image'. Select JPG format and choose size. The converted JPG saves in the same location [citation:2].
How do I convert WebP to JPG on Android without third-party apps?
Use Google Photos: Open the WebP image in Google Photos. Tap the Edit button (pencil icon). Make any edit – crop slightly or apply a filter at 0% strength. Tap 'Save copy'. The copy will be saved as JPG automatically. This is a clever workaround since Google Photos converts edits to JPG [citation:2].
Can I capture full webpage screenshots on desktop too?
Yes, for developers and QA teams, tools like screenie-tool capture across 57 device viewports with one command: 'npx screenie-tool https://yoursite.com'. It saves organized screenshots and generates an HTML report. Use --full-page flag for entire page capture [citation:1]. For automated testing, Apify's Multi-Resolution Screenshot Tool supports batch captures across mobile, tablet, and desktop [citation:5].
What's the difference between WebP and JPG quality?
WebP provides the same visual quality as JPG but with 25-34% smaller file sizes. It also supports transparency (like PNG) and animation (like GIF). However, JPG has universal compatibility – every device and app can open it. For screenshots you plan to share or upload, JPG is safer unless you know the platform supports WebP [citation:2].
Are online WebP converters safe?
Reputable converters like GroupDocs delete uploaded files after 24 hours and use encryption. They state: 'Your privacy is our priority. The converted JPG file is available for download right away, and all uploaded files are permanently deleted after 24 hours. No one else can access them' [citation:6][citation:10]. For sensitive images, use offline methods (Paint/Preview) or on-device conversion.
What Actually Matters
- iPhone full page: Built-in Safari saves as PDF; WebCapture app saves as JPG [citation:3][citation:7]
- Android full page: Scroll Capture app – free, 100% quality option [citation:9]
- iPhone WebP → JPG: Files app → Quick Actions → Convert Image [citation:2]
- Android WebP → JPG: Google Photos → Edit → Save copy trick [citation:2]
- WebP advantage: 25-34% smaller than JPG, same quality [citation:2]
- Online converters: Fast but files deleted after 24 hours [citation:6][citation:10]
Need to Convert More Than Just WebP?
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