Pick an output format and quality, convert one or many images, and download or zip — without uploading.
Image Format Converter decodes many common image types and writes new files as JPG, PNG, or WebP at a quality you choose. One file downloads with a fresh extension; many files download as converted-images.zip assembled in the browser. No upload.
It complements Image Convert, which handles the everyday three-format loop in a simpler UI. Use this page when a folder mixes BMP, GIF, PNG, and JPG, or when you batch-convert an entire album for a client who mandated WebP.
Photographs usually belong in JPG at quality 90 unless the portal forbids lossy compression. Graphics with text belong in PNG. WebP is a strong choice for modern sites when the viewer supports it; many government forms still want JPG. The comparison in JPG vs PNG vs WebP is the long-form reference.
HEIC belongs in HEIC to JPG before you land here, because phone photos need the dedicated decoder path. After JPG exists, convert to PNG or WebP when required.
Rename outputs sensibly inside the zip by fixing source names first. Converting two hundred scans at once may freeze a phone; work in chunks. For email attachments, read compressing images for email after format conversion.
Animated GIFs usually become a still frame. Keep the original GIF when motion matters.
Decode and encode happen entirely in the tab. The zip is built with the same local helper used elsewhere on QuickConvert. Analytics may count a visit; it does not receive pictures.
Websites reject files for size, dimensions, and format — not only for the suffix on disk. Converting fixes true type mismatches described in converting PNG, JPG, and WebP. When rejection persists, read why a form rejects your image and measure pixels.
After conversion, OCR with Image OCR may work better on PNG screenshots than on fuzzy JPG. Product pipelines may crop with Image Crop, convert here, then compress for the storefront.
Building PDFs from a set of uniform JPGs is a separate step on Images to PDF once formats match what you need.
Lossless PNG to JPG is irreversible detail loss. Keep the PNG master in your project folder when you might need transparency again later.
When you standardise a client folder, convert everything to one format here, then run a single compress pass so quality settings stay consistent. Document the quality number in the project readme so the next batch matches.
Scanned TIFF inputs are uncommon in browsers; export TIFF to PNG from a desktop scan app first if the drop zone rejects the file. The goal is a decode path the tab can read without plugins.
Spot-check edges after conversion: logos with sharp diagonals show JPG ringing sooner than flat icons. Switch those assets to PNG even if the rest of the album stays JPG.
No. Image Format Converter decodes each file in the tab and encodes a new blob. The zip, if you convert many files, is also built locally. QuickConvert never sees the bytes.
How JPG, PNG, and WebP differ on photos, screenshots, and transparency, and how QuickConvert treats each format.
How to change image format without uploading the file, including transparency, quality, and batch downloads on phone and desktop.
A practical way to shrink photos before you attach them, including what the quality slider and long-edge cap actually do.
“Unsupported file type”, “file too large”, “invalid dimensions”: what each image upload error usually means, and how to fix WebP, HEIC, renamed files, and size problems.