Image Resize
Resize images locally in the browser.
Open tool →KERVONI TOOLS
50 Free Tools
Browser-first utilities designed to be fast, private and inexpensive to run.
50 / 50 results
Image Compress
Reduce file size with sensible quality controls.
Open tool →JPG / PNG / WebP Converter
Convert common image formats without AI.
Open tool →Aspect Ratio Calculator
Calculate and scale width/height ratios.
Open tool →DPI / Print Size Calculator
Convert pixels, DPI and physical print dimensions.
Open tool →CM / Inch / Pixel Converter
Convert print dimensions with DPI awareness.
Open tool →Percentage Calculator
Fast percentage calculations for everyday use.
Open tool →Discount & Markup
Calculate discount, markup and final price.
Open tool →Profit Margin Calculator
Calculate margin, markup and target selling price.
Open tool →CSV Cleaner
Remove duplicates and normalize simple CSV data.
Open tool →CSV ↔ JSON Converter
Convert CSV and JSON locally while preserving IDs and validating columns.
Open tool →PDF Merge
Combine PDF files in a chosen order without uploading them.
Open tool →Word & Character Counter
Count words, Unicode characters and lines locally.
Open tool →Text Case Converter
Convert text to uppercase, lowercase or title case.
Open tool →JSON Formatter & Validator
Validate, format or minify JSON without changing number tokens.
Open tool →Base64 Encoder & Decoder
Encode and decode UTF-8 text using standard Base64.
Open tool →URL Encoder & Decoder
Percent-encode or decode a URL component locally.
Open tool →Password Generator
Generate random passwords on your device using Web Crypto.
Open tool →Unix Timestamp Converter
Convert Unix seconds, milliseconds and ISO dates with explicit timezones.
Open tool →Extract PDF Pages
Extract selected PDF pages into a new file without uploading.
Open tool →UUID Generator
Generate up to 100 random UUID v4 identifiers on your device.
Open tool →SHA Hash Generator
Calculate SHA-256, SHA-384 or SHA-512 hashes of UTF-8 text locally.
Open tool →HTML Entity Encoder & Decoder
Escape HTML special characters or decode common and numeric entities.
Open tool →Sort Lines & Remove Duplicates
Sort text lines naturally or remove exact duplicates locally.
Open tool →URL Slug Generator
Create lowercase ASCII URL slugs from headings and accented text.
Open tool →HEX / RGB / HSL Color Converter
Convert HEX or RGB colors to HEX, RGB and HSL with a preview.
Open tool →Color Contrast Checker
Check opaque text and background colors against WCAG contrast thresholds.
Open tool →Number Base Converter
Convert signed integers between binary, octal, decimal and hexadecimal without rounding.
Open tool →Date Difference Calculator
Calculate calendar days, complete weeks and hours between two dates.
Open tool →Length, Weight, Temperature & Data Converter
Convert metric and imperial units, temperatures and decimal or binary data sizes.
Open tool →PDF to JPG Converter
Render selected PDF pages as JPG images with DPI and quality controls, without uploading.
Open tool →JPG to PDF Converter
Combine JPG, PNG or WebP images into one PDF in your chosen order.
Open tool →Split PDF into Separate Pages
Download each selected PDF page as a separate PDF in one ZIP archive.
Open tool →Rotate PDF Pages
Rotate all or selected PDF pages clockwise by 90, 180 or 270 degrees.
Open tool →Remove PDF Pages
Delete selected PDF pages and download the remaining document locally.
Open tool →Reorder PDF Pages
Set a new order for every PDF page using page numbers and ranges.
Open tool →Crop Image
Crop JPG, PNG or WebP images with percentage coordinates and preview the result.
Open tool →Rotate & Flip Image
Rotate images by right angles or flip them horizontally and vertically.
Open tool →Text Difference Checker
Compare two texts line by line and highlight added, removed and unchanged lines.
Open tool →Random Number Generator
Generate random integers in a chosen range, with optional unique results.
Open tool →QR Code Generator
Create a static QR code from text or a link and download PNG or SVG.
Open tool →Age Calculator
Calculate age in calendar years, months and days on a chosen date.
Open tool →VAT Calculator
Add VAT to a net amount or extract VAT from a total with your chosen rate.
Open tool →Loan Payment Calculator
Estimate fixed monthly payments, total repayment and interest.
Open tool →Tip & Bill Split Calculator
Calculate a tip and split the total equally between people.
Open tool →Lorem Ipsum Generator
Generate placeholder text by word or paragraph count.
Open tool →Markdown to HTML Converter
Convert Markdown to sanitized HTML code for copying or downloading.
Open tool →JWT Decoder
Decode a JWT header and payload locally without verifying its signature.
Open tool →Regex Tester
Test JavaScript regular expressions and inspect match positions locally.
Open tool →Image Metadata Remover
Re-export JPG, PNG or WebP images as PNG without original EXIF metadata.
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