Free Online Image Converter (PNG, JPG, WebP, ICO)
An image converter changes a picture from one file format to another. You may need to turn a PNG screenshot into a smaller JPG for email, change a JPG photo into a WebP file that loads faster on your website, or build an ICO favicon from your logo. The tool below does all of this free, in your browser, with no uploads and no signup.
This free image converter changes PNG, JPG, WebP, GIF, BMP and SVG pictures into PNG, JPG, WebP, BMP or ICO files right in your browser. Nothing is uploaded, so your images never leave your device. Convert one file or a whole batch, tune quality, resize, then download. No signup, no watermark, no cost ever.
Honest notes: converting re-encodes pixels in your browser, so EXIF data and color profiles are dropped from every output file. GIF input uses the first frame only. ICO output always packs 16, 32 and 48 px sizes for favicons. Images are never enlarged: a resize target larger than the original is capped at the original size. HEIC photos from iPhones are not supported yet.
How does this image converter work?
Add your pictures, pick an output format and settings, and download the converted files. The whole process takes under a minute, and every step happens on your own device, so your images stay private.
Step 1: Add your images
Drag and drop files onto the box above, click the box to browse your device, or copy an image and paste it with Ctrl+V. The tool accepts PNG, JPG or JPEG, WebP, GIF, BMP and SVG files. You can add one picture or dozens at once. There is no file count limit in the tool itself. Your device memory is the only real cap, so very large batches of huge photos may slow down an older phone.
Step 2: Pick the output format and settings
Choose PNG, JPG, WebP, BMP or ICO from the format menu. For JPG and WebP, drag the quality slider to balance detail against file size. If you pick JPG or BMP and your picture has transparent areas, choose the background color that fills them. White is the default. You can also set a target width, height or percentage to resize while you convert.
Step 3: Check the live before and after numbers
Every image gets its own card showing the original dimensions, file size and format next to the converted result. You see the exact savings percent before you download anything. Change the quality slider and watch the output size update live, so you can find the smallest file that still looks good.
Step 4: Download your files
Hit Download on any single card, or press Download all to save every converted file. Downloads arrive one by one, straight to your normal download folder. Your browser may ask permission the first time you allow multiple downloads. That is normal and safe.
In a hurry? The one-click presets set everything for common jobs. Web Photo picks WebP at quality 80. Blog Image picks JPG at quality 82 capped at 1600 px wide. Favicon builds a multi-size ICO. Email Small makes a light JPG capped at 1024 px. Lossless Archive keeps full-quality PNG.
Which image format should you choose?
Pick WebP for photos on the web, PNG for graphics with sharp lines or transparency, JPG when you need the widest compatibility, and ICO only for favicons. BMP is rarely the right choice today because its files are huge.
Every image format is a trade-off between file size, picture quality and features like transparency. A good image converter makes switching between them a one-click job, so the format choice never slows you down. The table below sums up what each format this tool produces can and cannot do.
| Format | Compression | Transparency | Animation | Best for |
|---|---|---|---|---|
PNG | Lossless | Yes | No | Logos, screenshots, graphics with text |
JPG | Lossy | No | No | Photos where small files matter |
WebP | Lossy and lossless | Yes | Yes | Web photos and modern sites |
BMP | Mostly none | No | No | Legacy Windows software only |
ICO | Lossless (PNG inside) | Yes | No | Favicons, nothing else |
PNG keeps every pixel exactly. That makes it perfect for logos, screenshots and any graphic with sharp edges or text, where lossy compression would smear the lines. The price is file size: a PNG photo can be five to ten times heavier than a JPG of the same picture.
JPG (also written JPEG) throws away fine detail the eye barely notices. For photos it gives the smallest files of the classic formats, which is why cameras and phones use it. It cannot store transparency, and every re-save loses a little more quality, so keep a lossless master copy of anything you plan to edit again.
WebP is the modern all-rounder. Google Developers report that WebP images are typically 25 to 34 percent smaller than comparable JPEG files at the same visual quality. It handles transparency like PNG and even animation like GIF. Every current browser supports it, so it is the default pick for web images in 2026.
BMP stores pixels with almost no compression. Files are enormous, but a few old Windows programs still demand it. Convert to BMP only when a specific piece of software asks for it.
ICO is a container, not really a picture format. One ICO file holds several bitmap sizes, and browsers pick the right one for tabs, bookmarks and shortcuts. This tool packs 16, 32 and 48 px versions into every ICO it builds, which covers standard favicon use.
Use WebP for web photos, PNG for graphics with sharp edges, JPG when you need wide compatibility, and ICO only for favicons.
How does the quality slider change file size?
The quality slider controls how much detail a lossy format throws away. Lower numbers mean smaller files and softer images. Higher numbers keep more detail but cost more bytes. The slider only affects JPG and WebP, because PNG, BMP and ICO are lossless and ignore it.
Lossy compression works by deleting picture information your eyes are least likely to miss: subtle color shifts, fine grain, tiny texture. At quality 90 and above, most photos look identical to the original while weighing far less. Around quality 75 to 85 sits the sweet spot for the web, where files shrink a lot and the difference is hard to spot without zooming in. Drop below 60 and you start to see blocky patches and smeared edges, especially in skies and skin tones.
The trade is not linear. Moving from quality 95 to 85 might cut a photo to half its size with no visible change. Moving from 85 to 75 cuts another big chunk with only a small visible cost. That is why this image converter shows you the live output size as you drag: you can stop at the exact point where smaller stops being worth it.
A few practical numbers help set expectations. A 4000 by 3000 px phone photo saved as JPG at quality 90 often lands near 2 to 3 MB. The same shot at quality 80 usually lands near 700 KB to 1.2 MB. Converted to WebP at quality 80, it often drops to 400 to 700 KB. These are rough ranges, not promises, because busy detailed scenes compress worse than simple ones. Your own before and after panel is the honest judge.
WebP deserves a special mention here. Because its codec is newer and smarter than JPEG, WebP at quality 80 frequently looks as good as JPG at quality 90 while weighing less. Google Developers measured WebP files as typically 25 to 34 percent smaller than JPEG at equivalent quality. If file size is your main worry, try WebP first.
One more rule: never re-save a JPG as a JPG many times. Each save throws away a little more detail, and the damage adds up. Convert from your original or from a PNG master, and treat each JPG output as final.
What happens to transparency when you convert an image?
Some formats keep transparency and some do not. PNG, WebP and ICO preserve the alpha channel, while JPG and BMP flatten transparent areas against a background color you choose. This tool defaults that color to white and lets you change it.
Transparency lives in the alpha channel, an extra layer of data that says how see-through each pixel is. Formats either support that layer or they do not, and there is no middle ground. The matrix below shows exactly what each output format does with transparent pixels.
| Output format | Keeps transparency? | What happens to transparent areas |
|---|---|---|
PNG | Yes | Alpha channel preserved exactly |
WebP | Yes | Alpha channel preserved exactly |
ICO | Yes | Alpha preserved inside each PNG entry |
JPG | No | Flattened against your chosen background color |
BMP | No | Flattened against your chosen background color |
The most common surprise is the PNG to JPG conversion. A logo with a transparent background becomes a logo on a solid rectangle. That is not a bug in any converter: the JPG format has no alpha channel at all, so something must fill the see-through pixels. White is the usual choice because it matches most pages and documents, which is why this tool defaults the background picker to white.
Change the background color when white looks wrong. A dark logo with soft glowing edges can get an ugly white halo on a dark website, so pick a color close to the page it will sit on. Product photos for marketplaces usually want pure white anyway. Screenshots pasted into documents look cleanest on white too.
Going the other direction is simpler. Converting a JPG to PNG or WebP never creates transparency, because the JPG never had any. The output keeps every pixel opaque. Transparency can only survive a conversion, never appear from nothing.
JPG has no alpha channel, so every transparent pixel must become a solid color. Choose that color on purpose instead of accepting a surprise.
How do you convert many images at once?
Drop all your images in at once and one set of settings applies to every file. You can override the output format on any single file, then download everything with one click. Files save one by one, straight to your device.
Batch conversion is where an image converter saves real time. Think of a blogger with forty screenshots to shrink, or a shop owner with a folder of product photos that all need to become WebP. Doing those one at a time in a desktop app means repeating the same clicks forty times. Here you set the format, quality and size once, and every file follows.
The workflow has four parts:
- Add everything first. Drag a whole selection of files onto the drop box. Each image appears as its own card with a thumbnail, so you can confirm nothing is missing.
- Set global settings. The format menu, quality slider, background color and resize boxes apply to the full batch. Change any of them and every card re-converts and shows fresh before and after numbers.
- Override single files when needed. Each card has its own format menu. If forty images should become WebP but the logo must stay PNG, set the batch to WebP and flip just the logo card to PNG.
- Download all. One button saves every converted file. Downloads start one after another with a short gap so browsers accept them. Your browser may ask you to allow multiple downloads on the first run.
Two honest limits apply. First, everything runs in your device memory, so a batch of hundreds of huge raw photos can slow down or strain a weak phone. For very large jobs, work in groups of twenty to thirty. Second, downloads come as individual files rather than one zip archive, because this tool uses zero external libraries. That keeps it fast and private, and your files land in the download folder with clear names anyway.
Set the conversion once, apply it to the whole batch, and let the per-file override handle the exceptions.
Should you resize images while converting?
Resize when the original is bigger than you need. Set a width, a height, or a percentage, and the aspect ratio lock keeps the picture from stretching. The tool never enlarges images, so small originals stay sharp.
Most pictures are bigger than their job. A phone photo is often 4000 px wide, but a blog post shows it at 800 px and an email attachment needs even less. Converting without resizing ships thousands of wasted pixels that slow every page load and clog every inbox. Shrinking inside the image converter fixes the size and the format in one step.
You have three ways to set the new size:
- Target width. Type 1600 and a 4000 by 3000 px photo becomes 1600 by 1200 px. With the aspect lock on, the height follows automatically.
- Target height. Useful for portrait shots and banners where the vertical size matters most.
- Percentage. Type 50 to halve both dimensions. This is the simplest choice when you just want “much smaller” without doing math.
Leave the aspect ratio lock checked unless you have a reason to stretch. Unchecked, a width of 800 and a height of 800 turns a wide photo into a square and everyone in it looks squeezed. With the lock on, setting one side computes the other side from the original proportions, so circles stay circular.
The no-enlarge rule protects you silently. If you type a width of 2000 px for a 1200 px original, the tool caps the output at 1200 px. Blowing up a small image never adds real detail. It only makes a bigger blurry file, so the tool refuses to do it.
A quick note on DPI for print: DPI only matters on paper, not on screens. What counts for print is total pixels. A 4 by 6 inch print at 300 DPI needs 1200 by 1800 px of real pixels. If your image has that many pixels, it will print fine at that size no matter what any DPI field claims. Resize by pixels, and let the print shop handle the rest.
What are the most common image conversions?
Most people convert PNG to JPG to shrink screenshots, JPG to PNG for lossless editing, photos to WebP for the web, or a logo to ICO for a favicon. Each pair below explains when it makes sense and what to watch for.
If you only ever use an image converter for these five jobs, it has already earned its place in your bookmarks.
PNG to JPG
This is the classic shrink job. Screenshots and graphics saved as PNG are often far heavier than they need to be, and JPG can cut them to a fraction of the size. Set quality around 82 to 85 and check the live size readout. Remember the transparency rule: any see-through areas become your chosen background color, white by default. If the graphic has sharp text, zoom the preview before downloading, because heavy JPG compression smears fine lines.
JPG to PNG
People do this before editing. JPG is a final delivery format, not a working format, since every re-save costs quality. Converting to PNG gives you a lossless file you can crop, annotate and re-save without further damage. The file gets bigger, often much bigger, and that is expected. This conversion preserves quality. It cannot restore detail the JPG already lost.
PNG to WebP
The smart modern move for website graphics. WebP keeps the transparency that PNG users rely on, stays lossless when you want it, and still produces smaller files. A PNG logo or screenshot often drops 25 to 40 percent in size as WebP with zero visible change. Every current browser displays WebP, so there is little reason to ship PNGs on the web in 2026.
JPG to WebP
The best upgrade path for photo libraries. You keep the photographic look of JPG and gain the better compression of a newer codec, typically 25 to 34 percent smaller at the same visual quality according to Google Developers. Run a whole folder through the batch converter at quality 80 and watch gigabytes turn into megabytes. Keep your original JPGs archived in case you ever need them.
Any image to ICO for a favicon
Browsers still ask for ICO when they fetch your site icon, and one ICO can hold several sizes at once. Upload your logo as PNG or SVG, pick ICO output, and the tool packs 16, 32 and 48 px versions into a single favicon.ico file. Start from a square source with some padding around the logo so it stays readable at 16 px, where most icons actually appear. Name the file favicon.ico and place it at your site root.
Convert PNG to JPG to shrink, JPG to PNG to edit safely, anything to WebP for the web, and your logo to ICO for the favicon.
Is this image converter safe to use?
Yes. Conversion runs entirely in your browser with the Canvas API, so files are never uploaded to any server. There is no signup, no watermark, and nothing to install.
Most online image converters work by uploading your pictures to a server, converting them there, and sending back a download link. This tool skips all of that. Your browser reads the file, redraws the pixels in the new format, and hands you the result. Pull the network cable mid-conversion and it still works, because nothing ever leaves the page.
One honest technical note: converting drops EXIF data, GPS location tags and ICC color profiles from every output file. That is not a toggle here. It is simply how browser conversion works. The browser decodes the picture into raw pixels and re-encodes those pixels, and metadata does not survive the trip. For privacy that is good news: a photo you convert here cannot leak where it was taken.
A few more straight answers. GIF input converts the first frame only, since the tool makes still images, not animations. SVG input renders as a flat picture at its natural size. HEIC photos from iPhones are not supported yet, because browsers need a special decoder for that format. Nothing you convert gets a watermark, and there is no account that could leak your email.
Image converter FAQ
How do I convert a PNG to JPG without losing quality?
Add your PNG to the tool above, choose JPG as the output format, and set quality to 90 or higher. At that level the compression is gentle and most people cannot tell the result from the original. Check the live size readout to see what the quality costs. Remember that transparent areas become solid white, and keep your original PNG in case you need to convert again.
Does converting PNG to JPG reduce file size?
Almost always, and often by a lot. PNG stores every pixel exactly, while JPG uses lossy compression that discards detail. A 2 MB PNG screenshot often becomes a 200 to 400 KB JPG at quality 82, which is an 80 to 90 percent saving. Photos with smooth gradients shrink the most. Simple graphics with flat colors and sharp text shrink less, so check your before and after numbers.
What happens to transparency when converting to JPG?
JPG has no alpha channel, so transparent pixels must become a solid color. This tool fills them with your chosen background color, which defaults to white. A logo with a transparent background will sit on a solid rectangle in the JPG output. If you need to keep the see-through areas, convert to PNG or WebP instead, because both formats preserve transparency exactly.
Is it safe to convert images online?
It depends on where the conversion happens. This tool converts entirely in your browser, so your files are never uploaded to any server and nothing is stored. There is no signup and no account to leak. That makes it safe even for private photos or client work. Be more careful with converters that upload your files, since you cannot verify what happens to them afterward.
Can I convert multiple images at once?
Yes. Drop all your images onto the tool and one set of settings applies to the whole batch. Each file gets its own card with before and after stats, and you can override the output format on any single file. Press Download all to save everything. Files download one by one into your normal download folder, so allow multiple downloads if your browser asks.
What is the best image format for websites?
WebP, in most cases. It compresses photos 25 to 34 percent smaller than JPG at the same visual quality, according to Google Developers, and it handles transparency like PNG. Every current browser supports it. Use PNG only for graphics where perfect sharpness matters, such as logos with tiny text. Use JPG as a fallback when you must support very old software.
How do I make a favicon (ICO) from a PNG?
Add your PNG logo to the tool, choose ICO as the output format, and download the result as favicon.ico. The file packs 16, 32 and 48 px versions so browsers can pick the right size for tabs and bookmarks. Start from a square image with padding around the logo, since most favicons display at just 16 px. Place the file at your website root.
Does converting an image change its quality?
It can, depending on the direction. Converting to a lossy format like JPG or WebP at low quality softens fine detail, and that loss is permanent. Converting between lossless formats, such as PNG to WebP, keeps every pixel identical. Converting a JPG to PNG makes the file bigger but cannot bring back detail the JPG already lost. Convert from your original whenever possible.
What is the difference between JPG and JPEG?
There is none. JPG and JPEG are two names for the exact same image format. The shorter extension comes from old Windows systems that limited file extensions to three letters, so .jpg became the habit. Modern systems accept .jpeg too. This tool reads both and writes .jpg, which every program, browser and phone opens without trouble.
Can I convert HEIC photos from my iPhone?
Not with this tool yet. HEIC is the format iPhones use for photos, and browsers cannot decode it without a special decoder library, which this version does not include. To convert HEIC today, change the file on your iPhone first: open Settings, then Camera, then Formats, and choose Most Compatible to shoot future photos as JPG. HEIC support is on the roadmap for a later update.
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