Ellipse Converter

Convert, compress and trim video, audio and images, and scan, fill in, sign and mark up documents, entirely on your device. Nothing you pick is ever uploaded, and there are no accounts.

VIDEO
• Convert between MP4, MKV, WebM, MOV and more, with H.264, HEVC, AV1, VP9 and lossless FFV1
• Compress to a target size or quality, resize, change frame rate, rotate and crop
• Trim precise ranges with fades, join clips, extract audio or single frames, make GIFs and contact sheets
• Tone-map HDR to SDR, embed, burn in or extract subtitles

AUDIO
• Convert between MP3, AAC, Opus, FLAC and WAV, including variable-bitrate MP3
• Compress, trim, normalize loudness, change channels, speed or pitch, or the volume of just the parts you mark
• Edit tags and cover art, replace or mix audio tracks, make ringtones, and turn sound into a video over a picture or a plain colour

IMAGES
• Convert between JPEG, PNG, WebP, TIFF, AVIF, HEIC and JPEG XL
• Resize by pixels or print size, including the photo sizes forms ask for, set DPI, strip location and metadata
• Shrink pictures under the small file-size limits of upload forms
• Build animations and image sequences, flatten transparency

DOCUMENTS AND PDF
• Scan paper with your camera: pages found and straightened, text recognized on the phone
• Fill and sign any PDF, or fill in its own form fields: type, tick boxes, add the date and sign with your finger
• Mark up PDFs: highlight, draw, add notes, arrows, boxes and lines
• Merge, split, reorder, rotate, compress, number and watermark PDFs, and protect or unlock them
• Turn pictures into a PDF and pages into pictures, make scans searchable, and read tables, business cards and QR codes
• Keep documents in folders, find them by tag, and print PDFs and pictures

VR AND SPATIAL
• Repack stereo video between side-by-side and top-bottom layouts
• Convert between equirectangular, cubemap and fisheye projections
• Stitch calibrated dual-fisheye footage and repair spatial metadata

Every tool shows its options before it runs and validates each file you add. Your originals are never changed unless you choose to replace one with a result. Conversions run in a background queue with progress, cancel and retry. Finished files stay private until you share, print or save them, next to the original or in a folder, or you can have each new one saved to your gallery or a folder automatically.

FREE AND PRO
Every converter, compressor and trimmer is free, with no watermark and no file-size cap. The free version shows ads. Pro is an optional subscription that removes the ads and unlocks whole-folder batches, the advanced spatial tools and saved recipes.

Built on open-source media libraries. Notices and license texts are in Settings → Open-source licenses; their source code is at https://ellipseapps.pages.dev/converter/source/

Recent changes:
Bug fixes and improvements.