Upload preparation
Fix file format, file size, dimensions, page order, and naming before an upload form rejects your file.
Browser-based image and PDF tools
Convert, compress, resize, and prepare files online.
Use free online image and PDF tools for image to PDF, JPG to PNG, PNG to JPG, PDF to JPG, compress PDF, resize image, merge PDF, split PDF, and upload-ready file preparation. ConvertorLab keeps each task simple: choose the exact tool you need, work with files directly in your browser, preview the result, and download clean output without installing extra software.
Popular tools
Fast paths for the file tasks people usually need first.
ConverterImage Converter
Convert JPG, PNG, WebP, SVG, HEIC, and PDF formats from one browser workspace.
Open tool PDFImage to PDFCreate one PDF from photos, screenshots, scans, JPG files, or PNG images.
Open tool CompressImage CompressorCompress JPG, PNG, and WebP images before upload, email, or publishing.
Open tool CompressCompress PDFReduce PDF file size for upload forms, school portals, and email attachments.
Open tool ImageResize ImageResize images online with exact pixels, presets, quality, and output format.
Open tool ImageCrop ImageTrim photos, screenshots, product images, and profile pictures.
Open tool ImageAdd WatermarkAdd text or logo marks to drafts, previews, and shared images.
Open tool PDFMerge PDFsCombine documents into one clean PDF in the correct order.
Open tool PDFSplit PDFExtract the pages or page ranges you need from a larger document.
Open tool PDFOrganize PDFReorder, rotate, delete, duplicate, and prepare final PDF pages.
Open toolChoose by workflow
When you are not sure which tool to open, start from the file problem.
Format conversion
Use an online image converter or PDF converter only when the destination requires another accepted format.
File size reduction
Compress image files or reduce PDF size on a copy, then check readability before replacing the original.
Before you download the final file
A good file workflow is not just conversion. Check the output before sending it to a portal, client, school, office, marketplace, job application, or website.
- Keep the original file until the new version is accepted.
- Open the result and inspect text, faces, edges, and page order.
- Choose the smallest change that solves the real file problem.
- Use a clear filename before sharing or uploading.
Choose the tool by the file problem
Most upload issues come from one of four things: the file type is not accepted, the file is too large, the image dimensions are wrong, or the PDF pages are not in the right order.
When the format is wrong
Start with a converter. Use PNG to JPG when a form rejects transparent PNG files, JPG to PNG when you need PNG output from a photo, Image to WebP for smaller website images, or Image to PDF when photos and screenshots need to travel as one document.
When the file is too large
Use compression before changing the format again. Compress JPG or PNG images for email, portals, and marketplaces. Compress PDF when a document is readable but too heavy to upload. Always open the result before replacing your original file.
When the layout is the problem
Use image tools for dimensions, framing, watermarks, grayscale output, and clean filenames. Use PDF tools when the issue is page order, page extraction, merging, splitting, locking, or unlocking a document you are allowed to edit.
Helpful guides
Practical reading when you need to choose the right format, size, or PDF workflow.
JPG vs PNG vs WebP vs SVG vs HEICChoose the right image format for uploads, websites, documents, screenshots, and everyday sharing.Read guide
Compress a PDF for uploadReduce PDF file size for email, forms, school portals, and office systems without making pages hard to read.Read guide
Resize images for upload formsPick practical image dimensions before uploading profile photos, product images, application files, or website graphics.Read guide
Image and PDF tools FAQ
Quick answers for common file preparation questions.
What is ConvertorLab used for?
ConvertorLab helps with common image and PDF tasks such as converting image formats, turning images into PDF, compressing files, resizing photos, merging PDFs, splitting PDFs, organizing pages, and preparing files for upload.
Which tool should I open first if I only know the file problem?
Start by naming the problem. If the file type is not accepted, open a converter. If the file is too large, open a compressor. If an image is the wrong size, use resize or crop. If PDF pages are in the wrong order, use merge, split, or organize PDF.
Can I convert images to PDF online?
Yes. Use Image to PDF when photos, scans, screenshots, receipts, or mixed image files need to become one PDF document for upload, printing, email, or record keeping.
Can I convert PNG to JPG or JPG to PNG?
Yes. Use PNG to JPG when a website or form needs a JPG or JPEG file, and use JPG to PNG when you need PNG output from a photo or screenshot.
How do I reduce image file size before upload?
Use Image Compressor, Compress JPG, Compress PNG, or Compress WebP depending on the file type. If the image is too large because of dimensions, resize it first and then compress the final copy.
How can I compress a PDF without making it hard to read?
Use Compress PDF and choose a balanced setting when available. After compression, open the output and check text, signatures, images, and page order before submitting it.
Can I resize images for forms, profiles, or websites?
Yes. Use Resize Image to set exact pixel dimensions, prepare profile photos, reduce oversized product images, or create upload-ready images for forms and websites.
Which tools help combine or split PDF pages?
Use Merge PDFs to combine documents, Split PDF to extract or separate pages, and Organize PDF to reorder, rotate, duplicate, or remove pages before downloading a clean PDF.
Can I convert PDF pages to JPG images?
Yes. Use PDF to JPG when you need PDF pages as image previews, thumbnails, slides, website images, or files that can be opened in image editors.
Do I need to install software or create an account?
No. ConvertorLab is built for common browser-based image and PDF tasks, so you can prepare files without installing desktop software or creating an account for small everyday jobs.
Are browser-based file tools safe for private documents?
Use the privacy note on each tool page as your guide. Many ConvertorLab workflows are designed for browser-side processing where supported, but you should avoid using any online tool for highly sensitive files unless you are comfortable with the page's privacy details.
Can I use ConvertorLab on mobile?
Yes. The site is responsive, and simple jobs work well on mobile. For large batches, detailed cropping, or multi-page PDF work, a wider desktop or tablet screen is usually more comfortable.