Convert format
Free · in-browserConvert images between JPG, PNG, and WEBP formats.
Drop image or click to upload
JPG, PNG, WEBP
🔒
Batch convert
Get batch access →
Free tool · No account · No ads · No tracking · Runs in your browser
All processing runs in your browser — nothing is uploaded to any server.
Convert format · Crop · DPI · Padding · Resize · Rounded corners · Vector trace · Timestamp proof
Convert images between JPG, PNG, and WEBP formats.
Drop image or click to upload
JPG, PNG, WEBP
Batch convert
Get batch access →
Manual crop with freeform or locked aspect ratio. Nothing is uploaded — all processing happens locally.
Drop image or click to upload
JPG, PNG, WEBP
Batch crop
Get batch access →
Set the dot density on your image without changing pixel dimensions. 300 DPI is standard for print.
Drop an image here or click to upload
JPG, PNG
Batch DPI
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Add a solid-colour border to fit a target aspect ratio. Why padding over crop?
Drop an image here or click to upload
JPG, PNG, WEBP
Batch padding
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Resize images and control output quality and file size.
Drop an image here or click to upload
JPG, PNG, WEBP
Batch resize
Get batch access →
Add rounded corners to your images with adjustable radius roundness.
Drop an image here or click to upload
JPG, PNG, WEBP
Batch rounded corners
Get batch access →
Upload one image and choose your tier. Free trace runs in your browser; Pro trace runs on lab hardware.
Drop an image here or click to upload
JPG, PNG, WEBP
Batch trace
Get batch access →
Options
Fast browser-side SVG. Good for logos and icons.
High-fidelity vectorisation on lab hardware. 64-colour output.
Anchor a SHA-256 hash of any file to the world's largest decentralised network, Bitcoin PoW blockchain via OpenTimestamps.
Drop a file here or click to upload
Any file — hash anchored to Bitcoin blockchain
Produces a portable .ots proof file
Runs on lab hardware
Traditional
notarisation costs CHF 200+ and requires an office visit. A
cryptographic timestamp costs CHF 3, is mathematically verifiable, and
never expires.
This tool confirms your .ots proof file is valid and shows your file's fingerprint.
For
court submission, export the result and pair it with a Bitcoin block
explorer link — no lawyer required, but recommended for legal
proceedings.
Original file
Drop original file
.ots proof file
Drop .ots proof file
Verification result
Unlimited access to all Pro tools. No per-job friction.
Ideal for freelancers and studios who need the lab on demand.
No account. No ads. No tracking. Runs entirely in your browser — your images never leave your device.
If it saved you time, scan to donate — or just bookmark and share.
