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Image · Conversion

Convert any format. Keep every pixel.

HEIC to WebP, PNG to AVIF, JPEG to PNG. Pick a format, click download — the whole pipeline runs in your browser, in milliseconds, with zero uploads.

  • Client-side WebAssembly — your files never leave the device.
  • Alpha transparency, ICC profiles and EXIF preserved on request.
  • Batch up to 50 images — downloads as a single ZIP.
Converts →
JPEG PNG WebP AVIF HEIC GIF TIFF
→ Any combination

Trusted by 1.2M people · 8.4M images converted every month

No server involved. Conversion happens locally — your files stay in the browser tab throughout.

1.2M
Monthly users
7
Formats in
0
Files uploaded
What people say

iPhone exports, design assets, web images.

★★★★★

Converted my entire iPhone camera roll from HEIC to JPEG without installing anything. Took about 90 seconds for the whole batch.

LM
Lucas M.
★★★★★

I needed WebP for our e-commerce store and this converted 40 product images in one go. The output quality was indistinguishable from the originals.

GR
Gina R.
★★★★★

Working with NDA-protected client images. The conversion runs locally — nothing goes through a server. Simple requirement, hard to find elsewhere.

BN
Ben N.
★★★★★

Converting AVIF to PNG for Figma imports used to require Photoshop. Now I just drag and drop here. Saves me 10 minutes a day, easily.

SR
Sophie R.
★★★★★

The lossless mode for PNG→WebP is perfect for UI assets. No artifacts, full transparency preserved. Exactly what I needed for our design system.

TF
Tom F.
★★★★★

My team sends HEIC photos from iPhones and our CMS only takes JPEG. This is how we handle it now.

AC
Anna C.
★★★★★

Batch-converted 200 GIFs to WebP for a landing page. Page load went from 14s to 3s. Tool handled all of them without breaking a sweat.

DK
David K.
★★★★★

Drag, pick format, download. No sign-up, no limit, no watermark. Shared it with the design team and it's become the default for everyone.

EV
Helen V.
★★★★★

Converted my entire iPhone camera roll from HEIC to JPEG without installing anything. Took about 90 seconds for the whole batch.

LM
Lucas M.
★★★★★

I needed WebP for our e-commerce store and this converted 40 product images in one go. The output quality was indistinguishable from the originals.

GR
Gina R.
★★★★★

Working with NDA-protected client images. The conversion runs locally — nothing goes through a server. Simple requirement, hard to find elsewhere.

BN
Ben N.
★★★★★

Converting AVIF to PNG for Figma imports used to require Photoshop. Now I just drag and drop here. Saves me 10 minutes a day, easily.

SR
Sophie R.
★★★★★

The lossless mode for PNG→WebP is perfect for UI assets. No artifacts, full transparency preserved. Exactly what I needed for our design system.

TF
Tom F.
★★★★★

My team sends HEIC photos from iPhones and our CMS only takes JPEG. This is how we handle it now.

AC
Anna C.
★★★★★

Batch-converted 200 GIFs to WebP for a landing page. Page load went from 14s to 3s. Tool handled all of them without breaking a sweat.

DK
David K.
★★★★★

Drag, pick format, download. No sign-up, no limit, no watermark. Shared it with the design team and it's become the default for everyone.

EV
Helen V.
Anatomy · 01

Why modern formats are smaller — without looking worse.

JPEG uses DCT blocks tuned in the 90s. WebP adds inter-prediction borrowed from VP8 video. AVIF layers AV1's entire codec on top — the same technology compressing Netflix 4K. More prediction = fewer bits to describe the same image.

  • VP8
    WebP's inter-prediction
    Borrows motion-estimation from video to predict pixel values from neighbors — 30% smaller than JPEG on photos.
  • AV1
    AVIF's video-grade codec
    Up to 45% smaller than JPEG at the same perceptual quality. The trade-off: encoding is 5–10× slower.
  • LZ77
    PNG's lossless compression
    No data lost, ever — but file sizes are 15–30% larger than JPEG on photos. Ideal for screenshots and UI assets.
Anatomy · 02

Not all formats are born equal. Pick the right one.

Format choice isn't about taste — it's about capabilities. Transparency, color depth, HDR headroom, animation support: each format draws a different line between what it can and can't preserve.

  • Alpha
    PNG, WebP, AVIF
    JPEG has no alpha channel — transparent areas become white or black. Use PNG for lossless UI assets, WebP for smaller web images with transparency.
  • HDR
    AVIF + HEIC only
    10-bit color depth unlocks HDR headroom. AVIF is the only web-ready format that preserves HDR from iPhone ProRAW or mirrorless RAW.
  • Anim
    GIF, WebP, AVIF
    GIF caps at 256 colors. Animated WebP is the sweet spot: full color, small file. Animated AVIF is next — support is arriving in 2024–25.
How it works

Three steps. Zero uploads.

Drop a file in, pick the format you need, take the converted bytes home. Nothing routes through our servers — or any server.

01 / DROP

Drag the file onto the folder.

HEIC, JPEG, PNG, WebP, AVIF or GIF. Up to 50 at a time. Or click to pick from your device.

02 / PICK

Choose your output format.

One click — JPEG, PNG, WebP or AVIF. Toggle lossless mode for pixel-perfect results on UI assets.

Output formatWebP
JPEG PNG WebP AVIF GIF TIFF
03 / GET

Download. Or zip the whole batch.

One click. Single file or ZIP for batches. EXIF stripped by default — keep what you want from the options panel.

photo.webp
890 KB4032×3024
The honest comparison

kindatool vs. the ones that upload.

Other converters send your files to a server. We don't have one.

Feature comparison
★ Best pick kindatool
CloudConvert
Convertio
Squoosh
Runs entirely in your browser
Yes
Server
Server
Local
Batch conversion (50+ files)
Yes · ZIP
25 free / day
10 free / day
Single file
HEIC input support
Full
Yes
Yes
No
Alpha transparency preserved
Always
Partial
Partial
Yes
No account / no sign-up
Never required
Required
Required
N/A
Price
Free, forever
Free (limited) · $9/mo
Free (limited) · $9.99/mo
Free
Things people ask

Common questions about format conversion.

Does kindatool upload my images anywhere?
No. Every conversion happens locally in your browser using WebAssembly builds of libheif, libwebp, libavif and libjpeg-turbo. Open DevTools → Network and you'll see zero outbound requests during a conversion. We don't have a conversion server.
Which formats can I convert between?
Input: HEIC, JPEG, PNG, WebP, AVIF, GIF and TIFF. Output: JPEG, PNG, WebP and AVIF. Any combination works — for example, drop an iPhone .HEIC and get a .webp back at a fraction of the size.
Can I convert images without losing quality?
Yes — enable Lossless mode before converting. PNG output is always lossless. WebP and AVIF also support lossless encoding. For UI assets, icons, or screenshots, lossless is the right choice. For photos, lossy at quality 90+ is perceptually identical and 40–60% smaller.
How do I convert iPhone HEIC photos?
Drag your .HEIC files into the drop zone (or pick them from Files). Select JPEG or WebP as output, hit Convert, and download. The libheif WebAssembly decoder handles them natively — no plugins, no special apps needed, even on Windows and Linux.
Can I batch-convert dozens of images at once?
Yes. Drop up to 50 files in one go. The conversion queue runs in a Web Worker pool sized to your CPU — typically 4–8 files in parallel. All converted files download as a single ZIP. No size caps, no daily limits.
Will conversion remove my EXIF metadata?
By default we strip GPS coordinates and thumbnail data for privacy. From the options panel you can keep camera orientation, ICC colour profile, or the full EXIF block. The choice is yours — we just apply it locally, never transmit anything.
Pair it with

More image tools.

Compress
SSIM-aware size reduction.
Open →
Resize
Lanczos & Mitchell filters.
Open →
Rotate
90°, 180°, free-angle.
Open →
Watermark
Text or logo, batch overlay.
Open →
Blur
Gaussian, motion, faces.
Open →

Drop a file. Pick a format. Done.

Or paste a URL — we'll fetch the image and run the same local pipeline. Nothing routes through us, ever.

No upload No account No watermark No limits