No upload · No sign-up · No limits
Convert any image format,
without giving it away
A free online image converter for JPG, PNG, WebP, HEIC, AVIF, TIFF, GIF, BMP, ICO, SVG and PDF. Every conversion runs inside your own browser, so your images never touch a server — and there is nothing to install, sign up for or pay.
Drag & drop your images here
Batch conversion supported · up to 50 MB per file
🔒 Processed locally in your browser — nothing is uploaded.
How users rate this converter
4.9(14,004 ratings)FreeBusiness/Productivity
Genuinely private
There is no upload endpoint and no database. The conversion code is the only thing that ever sees your file, and it runs on your own machine — verifiable in your browser's Network tab.
Fast, even in batches
Heavy codecs load only when a format actually needs them, so the page opens instantly and a queue of files converts with no round trip to a server.
Real format control
Set quality per export, resize on the way out, choose the matte colour for formats without transparency, and grab everything as a ZIP.
How to convert an image online
To convert an image: drag your files onto the converter above, choose the output format from the dropdown, press Convert, then download the result. It takes about a second per image and nothing is uploaded to a server.
- Add your images. Drag them onto the box, or click Choose files. Mixed formats in one batch are fine — each file is detected individually.
- Pick the output format. Choose from JPG, PNG, WebP, BMP, ICO, AVIF or PDF. Lossy formats reveal a quality slider, defaulting to 85%.
- Adjust if needed. Turn on resizing for specific dimensions, or set a background colour when converting a transparent image to a format that cannot store transparency.
- Convert and download. Take files one at a time, or use Download all as ZIP.
Which image format should you use?
Use WebP for images on a website, JPG for photographs that must open anywhere, PNG for logos and screenshots needing transparency, AVIF when you want the smallest possible file and can serve a fallback, and SVG for icons that must scale. PDF is for bundling images into a document.
Format choice comes down to three questions: does it need transparency, is it a photograph or a flat graphic, and where will it be opened? The table below is the short version.
| If you need… | Use | Why |
|---|---|---|
| Photos on a website | WebP | 25–35% smaller than JPG at the same quality, supported by every modern browser |
| Photos that must open anywhere | JPG | Universal support on every device and program made since the 1990s |
| Logos, icons, screenshots | PNG | Lossless with full alpha transparency and no artefacts on sharp edges |
| The smallest possible file | AVIF | Roughly half the size of JPG, with a fallback for older browsers |
| Graphics that scale to any size | SVG | Vector shapes stay sharp from favicon to billboard |
| A favicon | ICO | Holds 16, 32, 48 and larger sizes in one file that every browser accepts |
| Print or archival masters | TIFF | Lossless, high colour precision and CMYK support |
| A document from several images | One page-based file that renders identically everywhere |
Image format comparison: size, transparency and support
AVIF and HEIC produce the smallest files at roughly half the size of JPG. WebP sits at about 0.65–0.75×. PNG is lossless but 5–10× larger than JPG for photographs, and BMP is uncompressed and larger still. Only JPG and BMP lack transparency support entirely.
| Format | Compression | Transparency | Animation | Typical size |
|---|---|---|---|---|
| JPG | Lossy | No | No | The baseline — roughly 1× by definition |
| PNG | Lossless | Yes | Yes | Roughly 5–10× a JPG for photographs; often smaller for flat graphics |
| WebP | Lossy or lossless | Yes | Yes | Roughly 0.65–0.75× a JPG at matched quality |
| GIF | Lossless | Yes | Yes | Often 5–20× a comparable WebP animation |
| BMP | Uncompressed | Yes | No | Frequently 20–50× a JPG of the same image |
| TIFF | Lossless | Yes | No | Commonly 10–30× a JPG |
| ICO | Container | Yes | No | Depends entirely on how many sizes are included |
| SVG | Vector (XML) | Yes | Yes | Often under 1/10th of a raster icon, but unbounded for complex art |
| HEIC | Lossy | Yes | Yes | Roughly 0.5× a JPG at matched quality |
| AVIF | Lossy or lossless | Yes | Yes | Roughly 0.5× a JPG at matched quality |
| Container | Yes | No | Approximately the size of the embedded images, plus a small overhead |
Why does converting in the browser matter?
Because a deletion promise cannot be verified, and never holding the file can. Server-based converters upload your image, process it remotely and promise to delete it. That promise does not survive a breach, a misconfigured storage bucket, an acquisition or a legal request.
None of those failure modes require anyone to act in bad faith. They are simply the ordinary risks of a file existing somewhere you do not control. If the file is never sent, the entire category of risk disappears — there is no copy to lose.
Browsers made this practical. The Canvas API handles common formats natively, and WebAssembly builds of the same codec libraries desktop software uses cover HEIC, TIFF, AVIF and PDF. The conversion that once justified a server now runs comfortably in a tab.
You can confirm the claim in about thirty seconds: open your browser’s developer tools, switch to the Network tab, and convert something. Page assets load; nothing carrying your image leaves. It also works with your connection switched off entirely. More about how it works →
Popular conversions
Each conversion has its own page with format specifications, quality guidance and answers to the questions people actually ask.
The formats, in one paragraph each
- JPG — Joint Photographic Experts Group (1992)
- The universal photographic format. Small files, lossy compression, no transparency — supported by every device and every piece of software ever made. Best for: Photographs and any image with smooth colour gradients, where a small file matters more than pixel-perfect fidelity.
- PNG — Portable Network Graphics (1996)
- Lossless compression with full alpha transparency. The right choice for logos, screenshots, diagrams and any graphic with sharp edges or flat colour. Best for: Logos, screenshots, diagrams, icons and any graphic with sharp edges, flat colour or transparency.
- WebP — Web Picture format (2010)
- Google's modern web format. Typically 25–35% smaller than JPG at the same visual quality, with transparency and animation support built in. Best for: Images shipped on a website, where you want JPG-like size with PNG-like transparency.
- GIF — Graphics Interchange Format (1987)
- The classic animated format, limited to 256 colours per frame. Widely readable but long since outclassed by WebP and AVIF for file size. Best for: Short looping animations where universal playback matters more than file size or colour fidelity.
- BMP — Bitmap Image File / Device Independent Bitmap (1990)
- An uncompressed Windows bitmap. Enormous files, but dead simple — still used by some legacy Windows and embedded software. Best for: Legacy Windows software and embedded systems that need raw pixel data with no decoding step.
- TIFF — Tagged Image File Format (1986)
- The print and archival standard. High fidelity, optional layers, and file sizes to match — most browsers cannot display it without conversion. Best for: Print production, archival masters and scanned documents, where fidelity outranks file size.
- ICO — Windows Icon (1985)
- The Windows and favicon format. Holds several square sizes in one file; 16×16, 32×32 and 48×48 are the sizes browsers actually reach for. Best for: Website favicons and Windows application icons, where several sizes must live in one file.
- SVG — Scalable Vector Graphics (2001)
- Vector graphics described as XML — infinitely scalable. Converting to SVG requires tracing, so this tool rasterises SVG out to pixel formats only. Best for: Logos, icons and illustrations that must stay razor-sharp at every size, from favicon to billboard.
- HEIC — High Efficiency Image Container (HEIF) (2015)
- Apple's default camera format since iOS 11. Roughly half the size of JPG at equal quality, but awkward outside the Apple ecosystem. Best for: Storage on Apple devices, where roughly half the file size of JPG at the same quality adds up fast.
- AVIF — AV1 Image File Format (2019)
- The AV1-based successor to WebP. Best-in-class compression — often half the size of JPG — with wide, modern browser support. Best for: Squeezing web images as small as they will go, when you can serve a fallback to older browsers.
- PDF — Portable Document Format (1993)
- A page-based document format. Handy for bundling scans, receipts or photo sets into one file that opens identically everywhere. Best for: Bundling several images into one page-based file for sending, printing or archiving.
Frequently asked questions
- What is the best free online image converter?
- The best converter for most people is one that does not upload your files. This tool converts between 11 formats — JPG, PNG, WebP, GIF, BMP, TIFF, ICO, SVG, HEIC, AVIF and PDF — entirely inside your browser, with no account, no watermark, no daily limit and no file ever leaving your device.
- Are my images uploaded to a server?
- No. Every conversion runs in your browser using the Canvas API and WebAssembly codecs. Open your browser's Network tab while converting and you will see no request carrying your file. Because of that we have no copy of your images to store, share or leak.
- Which image formats can I convert between?
- You can read JPG, PNG, WebP, GIF, BMP, TIFF, ICO, SVG, HEIC/HEIF, AVIF and PDF, and write JPG, PNG, WebP, BMP, ICO, AVIF and PDF. That covers 70 conversion pairs in total.
- How do I convert an image format?
- Drag your images onto the box above, choose the output format from the dropdown, and press Convert. Each file is processed on your device in about a second, then you download the results individually or as a single ZIP.
- Which image format is smallest?
- AVIF is usually the smallest, at roughly half the size of a JPG at matched visual quality, followed by WebP at around 25–35% smaller than JPG. HEIC matches AVIF on size but is barely supported outside Apple devices.
- Which image format should I use for a website?
- WebP is the safe default in 2026 — it is supported by every modern browser and is significantly smaller than JPG or PNG. Use AVIF when you can serve a fallback for older browsers, and keep SVG for logos and icons.
- Is there a file size or file count limit?
- You can queue as many files as you like. Each individual file is capped at 50 MB, because conversion happens in your browser's memory and very large files can crash the tab — especially on phones.
- Does it cost anything or require an account?
- No. There is no sign-up, no watermark, no daily quota and no paid tier. The site costs almost nothing to run because there is no server-side image processing, so there is nothing to ration.
- How do I convert HEIC photos from my iPhone?
- Drop the HEIC files in and choose JPG or PNG as the output. HEIC is decoded with a WebAssembly build of libheif that loads only when you actually add one, so it works even though most browsers cannot display HEIC natively.
- Why did my animated GIF lose its animation?
- Canvas-based conversion reads the first frame of an animated image. Converting an animated GIF to PNG or JPG therefore gives you a still image of frame one, which is what most people want from that conversion.
- Can I convert a PDF to images, or images to a PDF?
- Both. Drop a PDF in and each page is rendered to a separate image at high resolution. Go the other way and a set of images becomes one PDF with a page per image, in the order you added them.
- Does it work offline?
- Yes. Once the page and the codecs it needs have loaded, conversion requires no network connection at all — you can switch your connection off entirely and it keeps working.