All tools
Check your keyboard, microphone, screen and more. Simple tools, clear feedback, and a useful next step.
WebP to JPG
Batch conversion with quality control, background color and ZIP download. Local processing. No account required.
PNG to JPG
Turn transparent PNGs into JPG with your chosen background. Local processing. No account required.
JPG to WebP
Adjust WebP quality and compare the output size with your original JPG. Local processing. No account required.
Bulk image resizer
Fit a batch within maximum width and height, preserving proportions without enlargement. Local processing. No account required.
Image compressor
Adjust JPEG or WebP quality and compare actual output sizes. Local processing. No account required.
Remove image metadata
Recreate images from pixels without copying EXIF, GPS, IPTC or XMP. PNG encodes pixels losslessly. Local processing. No account required.
Word & character counter
Count words, Unicode characters and lines; estimate reading time at your chosen speed. Local processing. No account required.
Change text case
Convert uppercase, lowercase or word initials using language-aware rules. Local processing. No account required.
Remove duplicate lines
Keep the first occurrence and original line order; optionally ignore case and surrounding spaces. Local processing. No account required.
QR code generator
Static codes for text and URLs, with PNG and SVG exports. No expiry or tracking redirect. Local processing. No account required.
Wi-Fi QR code generator
Share personal WPA or open networks with a scannable code. PNG and SVG exports. Local processing. No account required.
Keyboard test
See which physical keys register, with QWERTY, AZERTY and QWERTZ layouts.
Key rollover test
Find how many keys your browser receives at the same time.
Keyboard repeat test
Look for unusually close presses without counting held-key auto-repeat.
Mouse test
Check left, right and middle buttons, scrolling and pointer movement.
Double-click test
Check for unexpectedly rapid pairs of left clicks.
Microphone test
See your input level, select a microphone and listen to a short local recording.
Webcam test
Preview your camera, switch devices and inspect the delivered image.
Stereo speaker test
Identify left and right audio channels with short, quiet tones.
Dead pixel test
Inspect your screen using clean, full-screen solid colours.
Display gradient test
Inspect grayscale transitions and near-black and near-white detail.
Gamepad test
See controller buttons, trigger values and stick axes in real time.
Touchscreen test
Trace a grid and inspect simultaneous finger contacts.
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