Drop or select as many as 20 supported files. Each file must be 50 MB or smaller and the complete batch must remain at or below 250 MB.
Free generator, runs in your browser
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Free Image Converter
The Novaverb image converter changes up to 20 pictures at a time into JPG, PNG, WebP or AVIF inside your browser. Set quality or a maximum width, then download the results without uploading a file.
Instant, no account
Nothing is uploaded
Copy or download the result
Your inputImage Converter
Drop your images here
or click to select - up to 20 files, converted right in your browser
Output
Resize mode
Quick sizes
Same size resizes the whole batch to one exact canvas without stretching. Use Edit on any thumbnail when you want to choose that image's crop yourself.
Browser-verified output: PNG is the standards-defined fallback. JPG, WebP or AVIF appears only after this browser proves it can encode that exact MIME type instead of silently returning a mislabeled PNG.
Edit crop
Drag anywhere on the image to draw a free crop. Drag again to replace the selection.
Private by design: this generator runs entirely in your browser - your text is never sent to Novaverb or any server.
Turn output into a monitored workflow
A Novaverb workspace crawls your live site, keeps what it finds, tracks changes over time and turns findings into assigned work.
Definition
What is an image converter?
An image converter changes a picture from one file format to another. The Novaverb Image Converter takes up to 20 JPG, PNG, WebP, GIF, BMP, AVIF, ICO, HEIC or TIFF files and re-encodes them as JPG, PNG, WebP or AVIF, offering an output format only when the browser can really encode it.
Scope
What does the image converter create?
The image converter creates a new image file for each picture in the batch, in the chosen output format and with the matching file extension. Every result shows the original size, the new size and the percentage saved or added, plus a download link. A file the browser cannot decode or encode gets an error instead.
Who it is for
Who is the image converter for?
The image converter is for people holding a picture in a format their destination will not accept. A content editor turns a WebP file into JPG for a CMS that rejects it, a developer produces WebP copies of PNG artwork for a web page, and a marketer prepares a batch of product shots before uploading them.
Why it matters
Why use an image converter?
Use an image converter when the format, not the picture, is the obstacle. A wrong format can be refused by a CMS or an email client, or can drop a transparent background. Converting before upload means the problem shows up in the downloaded file while the original is still at hand, not after the page is published.
Method
How does the image converter work?
The image converter works in four steps. Add up to 20 supported images, choose JPG, PNG, WebP or AVIF, set quality or a maximum width, then convert and review. Each file is decoded, drawn onto a canvas and re-encoded by the browser, and the returned file type is compared with the format requested.
What is an image converter?
An image converter changes a picture from one file format to another. Novaverb converts up to 20 browser-supported JPG, PNG, WebP, GIF, BMP, AVIF, ICO, HEIC or TIFF files into JPG, PNG, WebP, or AVIF when this browser can genuinely encode it. Conversion happens locally: the selected images are not uploaded to Novaverb.
Convert images in four steps
The available output buttons reflect this browser's real encoding support.
Select JPG, PNG, WebP or the AVIF option when it appears. Hidden formats failed an actual in-browser encoding probe.
Quality affects lossy output such as JPG and WebP. Max width can reduce oversized images without enlarging smaller originals.
Review the new extension, size and preview, then download one result or the complete batch. Keep originals until the output is approved.
Which image format should you choose?
The best output depends on transparency, compatibility, image type and the systems that must open it.
JPG is lossy and does not preserve transparency. Novaverb places transparent pixels on white before JPEG encoding, preventing unexpected black backgrounds.
PNG is appropriate for logos, interface captures and graphics that need alpha transparency or exact pixel preservation. Its quality control is disabled because Canvas PNG output is lossless.
WebP supports lossy and lossless coding plus transparency. This tool offers it only after the browser returns a real image/webp Blob.
A browser may display AVIF without being able to create it. The AVIF button stays hidden unless a real Canvas encoding probe returns image/avif rather than a PNG fallback.
Canvas conversion produces a still image. Animated GIF, WebP or AVIF input is flattened to the decoded frame; this tool does not preserve animation or timing.
These can be selected, but conversion succeeds only if the current browser can decode the file. Unsupported files receive an explicit error instead of a mislabeled output.
What conversion changes - and what it cannot promise
A new extension is not the only consequence of decoding and re-encoding pixels.
What the converter verifies
- The returned WebP or AVIF Blob has the exact selected MIME type.
- Output dimensions respect the optional maximum width without upscaling.
- JPEG transparency is intentionally flattened onto white.
- The work is performed in the page using browser image and Canvas APIs.
Important limitations
Re-encoding normally removes camera EXIF, GPS and other source metadata. Color-profile handling and compression output are browser-dependent. Animation is not preserved. A successful conversion does not prove that every CMS, email client or legacy application accepts the chosen format, so test the downloaded file in its destination.
Output is verified instead of inferred from the extension
The HTML Canvas standard allows an unsupported requested type to fall back to PNG. Novaverb probes encoding and checks the returned Blob MIME type before showing WebP or AVIF, preventing a PNG file from being incorrectly named .webp or .avif.
Input
What do you enter into the image converter?
You enter image files into the image converter by dropping them on the page or selecting them. Accepted extensions are JPG, PNG, WebP, GIF, BMP, AVIF, ICO, HEIC, HEIF and TIFF. The tool refuses any other file type, a file larger than 50 MB, a batch above 250 MB and anything beyond 20 images.
Result
What does the image converter output contain?
The image converter output is a grid with one tile per image. A tile holds a thumbnail, the file name, the size before and after conversion, a saved or larger percentage and a Download button. Below the grid, a summary counts the files that are ready and a Download all button saves them in turn.
Reading it
How do you use the image converter output?
Use the image converter output one tile at a time. A saved percentage means the new file is smaller, and a larger percentage means the chosen format or quality made it heavier. Check the extension of the downloaded file, open it in the system that will use it, and keep the original until the result is approved.
Source
Where does the image converter run?
The image converter runs in the page, using the browser's own image decoding and Canvas APIs. Selection, decoding, rendering and encoding all happen on the visitor's device, and Novaverb does not receive the image bytes. Results live only in the open tab, so download them before closing or reloading it.
Limits
What does the image converter not tell you?
The image converter does not tell you whether the destination accepts the new format. A successful conversion does not prove that a CMS, an email client or an older application can open the file. Animation is not preserved, camera EXIF and GPS metadata are normally removed, and color-profile handling depends on the browser.
Evidence
What does an image converter result prove?
An image converter result proves that the browser returned a file whose media type matches the format selected, at dimensions that respect any maximum width without enlarging the original. It cannot prove that visual quality is acceptable or that metadata survived. Judge quality by eye in the downloaded file at full size.
Standards
Which standards does the image converter apply?
The image converter relies on the HTML Canvas standard maintained by WHATWG, the IANA registry of image media types and the W3C File API. Because the Canvas standard lets an unsupported type fall back to PNG, the tool probes each encoder first and rejects any result whose media type differs from the one requested.
Verification
How can you verify an image converter result yourself?
Verify an image converter result by opening the downloaded file outside the tool. Read its type and pixel dimensions in the operating system's file details, confirm the type matches the extension, view it at full size for compression artifacts, and place a converted PNG or WebP over a colored background to confirm transparency survived.
Example
What does a typical image converter finding look like?
A typical image converter case is a logo saved as a transparent PNG and converted to JPG. JPG has no alpha channel, so the tool fills the transparent pixels with white before encoding. The tile shows the new size, and the downloaded file carries the JPG extension and a white box where the background used to be clear.
Cost
Is the image converter free?
The image converter is free and needs no account. Nothing is uploaded, so there is no sign-in step between selecting files and downloading results. A free Novaverb account becomes useful only for work the browser tool cannot do, such as crawling a whole site and keeping its findings over time.
In a workspace
What does a Novaverb workspace add to the image converter?
A Novaverb workspace adds a crawl of the whole site, which the image converter cannot see. Crawl Explorer lists every URL captured in the project crawl and reports, for each page, how many images it carries, how many lack alt text, how many load lazily and how many are served in a modern format.
When to go further
When is a free image converter not enough?
A free image converter is not enough when the question is about a site and not a folder of files. Finding which published pages still serve older formats, or checking that converted images stayed in place after a redesign, needs a crawl of every page and a repeated measurement, which a browser tool cannot run.
Next step
What should you do after running the image converter?
After running the image converter, download the results and open each one in the place it will be used. Then upload the approved files, update any image references that pointed at the old extension, keep the originals as master copies, and reload the published page to confirm the new images display.
Related tools
Which free tools pair with the image converter?
The image converter pairs with the Image Compressor, the Image Resizer and the PageSpeed Checker. The Image Compressor lowers file size with a quality slider, the Image Resizer sets exact pixel dimensions or a crop, and the PageSpeed Checker runs one lab audit of the published page that will carry the converted images.
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Questions
What do people ask about the image converter?
People ask the image converter FAQ whether images are uploaded, which output format to choose, why WebP or AVIF may be missing, whether transparency and animation survive, whether EXIF and GPS metadata are removed, why a HEIC, TIFF or ICO file may fail to open, and what the batch limits are.
Are my images uploaded to a server?
No. Selection, decoding, Canvas rendering and encoding occur in your browser. Novaverb does not receive the selected image bytes. Avoid closing or reloading the tab until you have downloaded the results.
Which output format should I choose?
Choose JPG for photographs and broad compatibility, PNG for lossless graphics or transparency, and WebP for modern web delivery. Choose AVIF only when the button appears and the destination supports it.
Why is WebP or AVIF not available?
The page performs a real Canvas toBlob probe. If the browser cannot return the exact requested MIME type, the button remains hidden. This avoids downloading a PNG whose filename incorrectly ends in .webp or .avif.
Will conversion preserve transparency?
PNG and supported WebP or AVIF output can preserve alpha transparency. JPG has no alpha channel, so the converter deliberately fills transparent pixels with white.
Will animated GIF or WebP remain animated?
No. Canvas conversion creates a static output from the decoded image frame. Animation frames, timing and looping metadata are not preserved.
Does conversion remove EXIF and GPS metadata?
Normally yes. The image is decoded to pixels and re-encoded through Canvas, so EXIF, GPS and most source metadata are not copied. Keep the original whenever metadata matters.
Why can't the tool open a HEIC, TIFF or ICO file?
Selection does not guarantee decoding. Those formats depend on the browser and operating system. The file receives an error when the browser cannot decode it; Novaverb does not substitute a guessed result.
What are the batch limits?
A batch supports up to 20 images, 50 MB per file and 250 MB total. These safeguards reduce the risk of exhausting browser memory; very large pixel dimensions can still exceed device or Canvas limits.
Is my data uploaded anywhere?
No. This generator runs fully client-side in your browser. Nothing you type is sent to a server, so it is safe to use on private content.
Is it really free?
Yes, with no account. A Novaverb workspace is only needed when you want your live site crawled, the results kept and changes tracked over time.
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