Free online converter: Base64, Unix timestamp, JSON, km to miles, VAT, UUID, HEX to RGB, amount in words. In the browser, no sign-up.
Encode UTF-8 text or a file to Base64, decode a string, and switch URL-safe alphabet. Runs in the browser.
Paste seconds or milliseconds, get ISO 8601 and local time, or pick a date and copy the epoch.
Split a JWT into readable JSON claims in the browser. The signature is displayed, not verified.
Format JSON with indent for reading, or minify whitespace for APIs. Validate and optionally repair broken input.
Length converter for km, miles, meters and feet. International statute mile by default; nautical mile is in the list.
Temperature converter: °C to °F and back, plus Kelvin. Instant, no sign-up, in the browser.
Percentage calculator: X% of Y, reverse percent, discount and markup. Steps in the result panel.
Pull net and VAT out of a tax-inclusive price, or add VAT on a net amount. Set the rate once.
Mint RFC 4122 UUID version 4 (random GUID) in the browser. Copy one or a batch. No server.
Mint UUID version 7: Unix-ms timestamp in the high bits, random in the rest. Better for indexes than v4.
Build a password from length, symbols and an optional word list. Entropy estimate stays on the device.
Word and character counter online: reading time, keyword density and top words. Free, in the browser.
Add a watermark to a photo online free: text or logo, opacity, position and tile. In the browser, no upload.
Crop a photo online free to 1:1, 4:5, 16:9 or custom pixels. Drag the frame in the browser.
Rotate an image online free: 90°, flip, fill and auto-crop. No upload.
Crop a snapshot to the document size, export JPEG, keep the file on the device. Confirm DPI with the agency.
Draw a signature online or drop the background from a scan. Transparent PNG, local in the browser.
Split a photo into tiles online: 2 parts, 2×2, 3×3 Instagram grid. Download a ZIP of slices.
Combine photos into one image: row, column, grid or collage. Gap, background and reorder. Free, in the browser.
Compress photo online free: shrink JPG, PNG, WebP and AVIF. Quality and ZIP. No upload.
Convert PNG to JPG online free and shrink the file. Quality slider, local in the browser.
Resize an image online: exact pixels, percent and social presets. Free in the browser, no upload.
Make a QR code from a URL online free: color, size, error correction and PNG. Local in the browser.
Generate a Wi‑Fi QR: SSID, WPA/WEP or an open network. A guest scans and joins without typing the password.
Pull every image from a page URL: img, srcset, Open Graph, CSS backgrounds. Copy links or download a ZIP.
Paste a photo link, pick a format, and save the file. Works for one URL or a list.
Mirror a photo online free: horizontal or vertical flip in the browser. No upload.
Correct a photo online: light, color, blur, grain and presets. Local in the browser, no upload.
Transliterate Russian to Latin and back online. For a nickname, page address or document, without sending the text.
Case converter online: uppercase, lowercase, title style or link style. Free in the browser.
Compute SHA-256, SHA-512 or SHA-1 in the browser via Web Crypto. Hex and Base64 output. File is not uploaded.
HEX ↔ RGB ↔ HSL converter online, OKLCH and WCAG contrast. Screen eyedropper in Chrome.
Number and amount in words online: currencies, cents with carry, batch. Local in the browser.
