Convert & Resize Images to JPG, PNG, WebP, TIFF, GIF & AVIF

Image conversion guide

How to convert an image online

Use this free, single-image converter and resizer with JPG, PNG, WebP, GIF, SVG, BMP, TIFF, HEIC, and HEIF input. Export to JPG, PNG, WebP, BMP, TIFF, GIF, or AVIF when supported. Set exact dimensions, lock the aspect ratio, prevent enlargement, use an output preset, or target a maximum file size. Phone-photo orientation is normalized automatically, and metadata can be removed or preserved for JPG-to-JPG conversion. Preview, compare, and download without sending the image to a server.

Choose one image

Select one file, drag and drop it into the upload area, or paste an image from your clipboard. HEIC, HEIF, and TIFF files are decoded locally using browser-side code.

Choose format and settings

Pick an output format and preset, resize by width and height, adjust quality, enter a target size, and choose whether supported JPG metadata is removed or preserved.

Compare and download

Compare previews, output dimensions, file size, and effective quality. Customize the filename and JPG transparency background, then download the converted image.

Which image format should you use?

JPG

JPG is a good choice for photographs and images with many colors. It creates compact files but cannot preserve transparency.

PNG

PNG is useful for logos, screenshots, illustrations, and images that need transparent backgrounds. It is lossless but can create larger files.

WebP

WebP is a modern format that often offers a useful balance of quality, file size, and transparency support for websites.

BMP and TIFF

BMP and TIFF are lossless compatibility formats. BMP is useful for older Windows software, while TIFF is common in scanning, print, publishing, and archival workflows. These files are often larger than web formats.

GIF and AVIF

GIF is broadly compatible but limited to 256 colors, so it is best for simple graphics rather than photographs. Animated GIF input keeps its animation when exported as GIF. AVIF can produce very small, high-quality files, but browser encoding support varies.

Features and limitations

HEIC, HEIF, and TIFF input

HEIC and HEIF photos and TIFF images are decoded locally using browser-side code. Multi-page or multi-image files use the first decoded image. Decoder code is downloaded by the page, but your image is not sent with that request.

Resize and normalize orientation

Enter exact output dimensions, lock the original aspect ratio, and prevent small images from being enlarged. Orientation stored by cameras and phones is applied to the pixels during re-encoding so the downloaded image displays upright.

Presets and target file size

Use Best quality, Smallest file, Web, or Lossless presets, or choose custom settings. For JPG, WebP, and AVIF, an optional maximum size automatically finds the highest available quality that fits; very small targets may not be achievable.

Paste an image

Use Paste an image after copying a screenshot or image to your clipboard. Clipboard access depends on browser permissions and is requested only after you select the button.

Output controls and comparison

Choose a custom filename, adjust quality for lossy formats, and select the background used for transparent pixels in JPG output. The tool shows dimensions, effective quality, original and converted sizes, and the percentage difference.

Animation

An animated GIF stays animated only when exported as GIF without resizing, and an animated WebP stays animated only when exported as WebP without resizing. Resizing or choosing another format exports the displayed frame as a still image.

Transparency and metadata

PNG, WebP, and supported AVIF output preserve transparency. JPG replaces transparency with your selected background. Metadata is removed by default for privacy. JPG-to-JPG conversion can preserve available EXIF, ICC color-profile, and IPTC segments while resetting the EXIF orientation to prevent double rotation. Other output formats do not preserve source metadata.

Browser support and previews

AVIF export depends on your browser's encoder. BMP and TIFF are generated locally with lossless encoders and use a PNG copy for the on-page preview because browsers do not consistently display those formats.

One image at a time

The converter handles one image per session. Choose another image after downloading to begin a new conversion.

Is this image converter private?

Yes. Your image is decoded, resized, converted, previewed, and downloaded in your browser. Monthly Basis does not upload or store your source image. Embedded metadata is removed by default; if you explicitly preserve JPG metadata, remember that it can contain private details such as GPS location.

Frequently asked questions

Can I convert an image without uploading it?

Yes. Decoding, conversion, previewing, and downloading happen locally in your browser. The page downloads decoder code when needed, but your image is never sent to Monthly Basis.

What input and output formats are supported?

You can choose JPG, PNG, WebP, GIF, SVG, BMP, TIFF/TIF, HEIC, or HEIF input. Output options are JPG, PNG, WebP, BMP, TIFF, GIF, and AVIF when your browser supports it. Converting a still image to GIF creates a single-frame GIF.

Can I convert an iPhone HEIC photo or a TIFF scan?

Yes. HEIC, HEIF, and TIFF files are decoded locally. For a multi-page TIFF or multi-image HEIF file, the converter uses the first decoded image.

Can I paste a screenshot?

Yes. Copy an image and choose Paste an image. Clipboard access depends on browser support and permission, and is requested only when you use that button.

Will an animated GIF or WebP stay animated?

An animated GIF remains animated when exported as GIF at its original dimensions, and an animated WebP remains animated when exported as WebP at its original dimensions. Resizing or choosing another output creates a still image from the displayed frame.

Why does AVIF sometimes not work?

AVIF encoding is provided by the browser and is not available in every browser. If it is unsupported, the converter asks you to choose another output format.

How is the file-size change calculated?

The converter compares the original file size with the generated file size and reports whether the result is smaller or larger, including the percentage difference.

Can I resize an image while converting it?

Yes. Enter a width or height and keep the aspect ratio locked to calculate the other dimension automatically. The Do not enlarge option prevents output dimensions from exceeding the source image.

Can I convert an image to a specific file size?

For JPG, WebP, and supported AVIF output, enter a target maximum size in KB. The converter tests quality levels locally and uses the highest quality it finds under that limit. Some targets are too small to reach even at minimum quality.

What do the image conversion presets change?

Best quality uses high-quality lossy encoding, Smallest file selects WebP at a lower quality, Web selects WebP with balanced quality, and Lossless selects PNG. Choose Custom to control the format and quality yourself.

Will phone photos be rotated correctly?

Yes. The browser applies the source orientation when the image is decoded, and the converter writes the displayed orientation into the output pixels. Preserved JPG EXIF data has its orientation reset to normal to avoid a second rotation.

What happens to transparency and metadata?

JPG replaces transparent pixels with your selected background color. Other formats can store transparency, although compatibility varies for BMP and TIFF. Metadata is removed by default. When both input and output are JPG, Preserve can copy available EXIF, ICC, and IPTC metadata, including GPS data if present, so use Remove when privacy matters.

Does this tool process multiple images?

No. It handles one image at a time. Choose another image after downloading to begin a new conversion.

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