Convert, compress, resize, merge or trim any file in a few clicks
Convert, compress and resize images, PDFs, documents, video and audio online. Pick a tool, upload your files and download the result.
Most popular tools
The tools people use most to compress, resize and convert their files.
- Resize ImageImageResize images by pixels, percent or print size.
- Compress ImageImageCompress images to the exact KB you need.
- Image ConverterImageConvert images: JPG, PNG, WebP, HEIC, AVIF and more.
- Compress VideoVideoCompress videos to a smaller file size.
- Compress PDFPDFCompress PDFs to a smaller file size.
- PDF ConverterPDFConvert PDFs to editable Word, Excel or PowerPoint.
- Video to GIFVideoConvert video clips to animated GIFs.
- Passport Photo MakerImageResize photos to official passport and visa sizes.
- Convert to PDFDocuments & DataConvert Word, Excel, PowerPoint and other files to PDF.
- Image to TextDocuments & DataExtract text from images and scans.
- Merge PDFPDFMerge multiple PDFs into one file.
- Trim AudioAudioTrim songs and recordings to the length you need.
- Audio ConverterAudioConvert audio files: MP3, WAV, M4A, FLAC, OGG.
- Video ConverterVideoConvert MOV, MKV, AVI and WebM to MP4 and more.
- Unzip OnlineMore toolsExtract ZIP, RAR and 7z archives online.
- QR Code GeneratorMore toolsCreate QR codes for links, Wi-Fi and contacts.
- Crop ImageImageCrop images to a ratio or exact pixels.
- Image to PDFImageConvert one or more images to a PDF.
- Increase Image SizeImageIncrease image file size or dimensions.
- Image to SVGImageConvert JPG and PNG images to SVG.
- Split ImageImageSplit an image into equal tiles.
- Merge ImagesImageMerge images side by side or vertically.
- Image EffectsImageApply grayscale, blur, invert and other filters.
- PDF to ImagePDFConvert PDF pages to JPG, PNG or WebP.
- Split PDFPDFSplit a PDF into separate files or pages.
- Rotate PDFPDFRotate PDF pages.
- Unlock PDFPDFRemove a known password from a PDF.
- Protect PDFPDFPassword-protect a PDF file.
- Flatten PDFPDFFlatten form fields and annotations in a PDF.
- PDF to GrayscalePDFConvert a color PDF to grayscale.
- PDF to PDF/APDFConvert PDFs to PDF/A archive format.
- Resize PDFPDFChange PDF page size: A4, Letter or custom.
- Increase PDF SizePDFIncrease PDF file size to meet a minimum.
- Document to ImageDocuments & DataConvert document pages to JPG or PNG.
- Document ConverterDocuments & DataConvert between DOCX, ODT, RTF, HTML and TXT.
- Image to ExcelDocuments & DataConvert a table image to an Excel sheet.
- Ebook ConverterDocuments & DataConvert between EPUB, MOBI, AZW3 and FB2.
- Data ConverterDocuments & DataConvert between CSV, XLSX, JSON and XML.
- Video to AudioVideoExtract audio from video as MP3 or WAV.
- Trim VideoVideoTrim a video clip to the part you want.
- Audio to VideoVideoConvert audio to MP4 with a still image.
- Compress AudioAudioCompress audio files to a smaller size.
- Audio to TextAudioTranscribe audio to text.
- Zip FilesMore toolsCompress multiple files into one ZIP.
- Archive ConverterMore toolsConvert RAR and 7z archives to ZIP.
- Font ConverterMore toolsConvert fonts: TTF, OTF, WOFF, WOFF2.
- Subtitle ConverterMore toolsConvert between SRT, VTT, ASS and more.
- CAD ConverterMore toolsConvert DWG and DXF files and images to DXF.
- 3D Model ConverterMore toolsConvert between STL, OBJ, GLB and more.
- Pixel ConverterMore toolsConvert pixels to inches, cm and mm at any DPI.
01How it works
How it works in 3 steps
Files are processed on our servers, so every tool runs just as well on a phone or an older computer.
- 1
Choose a tool
Open the tool you need, or a preset such as a 50 KB image or an A4 page with the settings already filled in.
- 2
Upload and set options
Add up to 20 files from your device or the clipboard. Quality, size and page options are under Advanced settings.
- 3
Download the result
Download each file or all of them as one ZIP. Originals are deleted right after processing and results after 30 minutes.
02Why UltConvert
Made for real size and format limits
Upload forms, email and chat apps all set limits on file size, dimensions and format. Every tool is built to meet them.
Exact size targets
Compress to 50 KB, resize to 600 × 600 px or set an A4 page and get exactly that, with no guessing on a quality slider.
20 files per batch
Convert, compress or resize a whole batch of files in one go.
Files deleted automatically
Uploads are deleted after processing. We never keep, share or reuse your files.
Works on any device
Every tool works in the browser on Windows, Mac, Android and iPhone.
03Questions
Frequently asked questions
Quick answers about pricing, file handling and limits. Each tool page has its own questions too.
Is UltConvert free?
Yes. All tools are free to use and no signup is required. Ads keep the site running.
Where do my uploads go, and for how long?
They are processed on our servers, the original is removed as soon as the output is ready, and the output is deleted after 30 minutes. See the How it works page for the details.
How large can a file be?
Up to 95 MB per file and 20 files per batch. Video tools are the ones most likely to reach that limit.
Will converting lower the quality?
Converting between formats at high quality keeps files visually the same. Compressing to a small KB target lowers some detail, and the tool shows the final size and dimensions.
Do I need to install anything?
No. The tools run in any current browser on Windows, macOS, Linux, Android and iOS.
Which formats are supported?
Common image, document, PDF, video, audio, archive and font formats, plus a few specialist ones such as DWG and STL. Each category page lists what its tools accept.
04Who it's for
Who uses UltConvert
Students and applicants
Exam, visa and job portals set strict limits. Compress a signature to 20 KB or resize a photo to 35 × 45 mm before you upload.
Office and admin work
Compress scanned PDFs for email, merge contracts, convert PDF to Word or Excel and convert Office files to PDF.
Creators and sellers
Resize images for social posts and banners, compress videos for chat apps, convert clips to GIF and trim audio.
Small businesses
Turn invoices and quotes into PDFs, compress product photos for your store and make QR codes for menus and flyers.
Teachers and trainers
Merge handouts into one PDF, extract text from scanned pages and convert lecture recordings to text.
Developers and designers
Compress images for faster pages, convert images to SVG, convert fonts for the web and convert CAD and 3D files.
05From the blog
Guides and tips
Image Guides · 9 min read
Cropping to an Aspect Ratio: How Much of Your Photo Survives
Every ratio crop starts from the shape your camera recorded. Here is how much of a 4:3 or 3:2 photo each common ratio keeps, and when padding or a new shot is the better choice.
- File Formats & Fixes · 9 min readHEIC or JPG? Which iPhone Photo Format to Send WhereHEIC saves space on an iPhone but trips up forms, Windows PCs and print shops. Here is where to keep it, where to send JPG instead, and when PNG or a PDF is the better target.
- Social & Mobile · 11 min readInstagram Post Size Ratio: Plan One Photo for Feed, Grid and StoriesInstagram now takes feed photos up to 3:4. Here is how to frame one picture so its subject survives the feed, the narrower profile grid tile and a 9:16 story.
