Radius: Converter & PDF Tools

Radius converts photos, video, audio, PDFs, Office files, and archives on your iPhone. Your files are never uploaded, and you don’t need an account. For photos, video, and audio, you see the estimated size before you convert. Start in Radius, or from the Share menu in Photos, Files, and other apps. Everyday tools are free. Advanced conversions are free to try, then yours for good with a one-time purchase, not a subscription.

PHOTOS
• Convert between JPG, PNG, HEIC, WebP, GIF, TIFF, and BMP; also from AVIF, PSD, SVG, and camera RAW
• Shrink (compress) to under 1 MB, 500 KB, or 200 KB, or to 2048 or 1080 px on the long edge
• Photos to PDF, a long image, or a presentation; watermarks; background removal; text recognition
• Live Photos to video or GIF

VIDEO AND AUDIO
• Video to MP4, MOV, MKV, WebM, AVI, WMV, FLV, MPG, 3GP, or GIF, or extract the audio
• Audio to MP3, M4A, WAV, FLAC, Opus, OGG, AIFF, or WMA
• Trim clips; shrink video to under 25 MB, 720p, or 480p; animated GIFs to video
• Speech to Text (iOS 26 or later): SRT subtitles or a TXT transcript, recognized on your iPhone

PDF
• To PNG, JPG, TXT, Word, or a presentation
• Merge, split, shrink, page numbers, watermarks; add a password, or remove one you know
• Rotate, delete, and reorder pages; mark up with pen, highlighter, and text; add your handwritten signature

OFFICE FILES
• doc, docx, rtf, and odt to PDF or TXT; ppt, pptx, and odp to PDF, PNG, or JPG; xls, xlsx, ods, and csv to PDF. The layout may differ slightly from the original.

SCANNING AND TEXT
• Camera scanning straightens the page, whitens the background, and boosts contrast
• Recognize Traditional and Simplified Chinese, English, Japanese, and Korean text, saved as TXT or Word
• TXT to PDF, Word, or images; subtitles between SRT, VTT, and TXT

ARCHIVES
• Extract zip, 7z, rar (including RAR5), tar, tar.gz, tar.bz2, tar.xz, gz, and bz2; compress into zip, 7z, and tar.gz

FROM ANYWHERE
• Pick up to 50 photos and videos at once, pick files, scan or paste, or use Share > Radius in other apps
• Results go to the Files app > On My iPhone > Radius, plus an optional copy in another folder or Photos

PRIVACY
• Files are never uploaded to Radius or any third-party server. No account, ads, analytics, or tracking.
• Converting needs no internet. The network is used for App Store purchases and offer codes, the rating prompt, Speech to Text language downloads, and cloud files not yet on your iPhone.
• By default, converted photos keep time, location, and camera details (you can turn this off); videos keep theirs. Remove Metadata strips them from JPG, PNG, HEIC, video, audio, and PDF.
• Optional Face ID or Touch ID lock; Radius never gets your face or fingerprint data.

PRICING
Basic features are free for good: photo and PDF tools (other than those below), scanning, archives, Remove Metadata, and text and subtitle files.
Advanced features are video and audio (including Live Photos, GIF to video, trimming, and shrinking), Office files, text recognition, Speech to Text, background removal, and output to Word or presentations. They’re free for 20 conversions (one per successful file), plus 10 more, once, when you first run out. Then one in-app purchase unlocks them for good. On a new iPhone or after reinstalling, tap Restore Purchases. Offer codes work too.

REQUIREMENTS
• iOS 18.0 or later. Speech to Text needs iOS 26 or later and depends on device and language (Chinese, English, Japanese, Korean).
• From iOS 26, long conversions keep going when you switch apps (except Office files, text recognition, and background removal).
• Background removal and camera scanning depend on device support.

LIMITATIONS
• PDF to Word keeps the text, not the layout; PDF to presentation makes one image per page
• Scans saved as PDF have no searchable text; password-protected archives can’t be opened

Microsoft, Word, Excel, PowerPoint, Apple, iPhone, iCloud, and Live Photo are trademarks of their owners. Radius isn’t affiliated with them.