Browse all tools.
Explore every free online tool on OneClick Tools, grouped by category for easier browsing.
Image Tools
Image conversion, compression and resizing tools.
PNG to WEBP
Convert PNG images to WEBP online.
PNG to JPG
Convert PNG images to JPG online.
JPG to PNG
Convert JPG images to PNG online.
WEBP to PNG
Convert WEBP images to PNG online.
Image Resizer
Resize images online by width and height.
Image Compressor
Compress images online and reduce file size.
Image Cropper
Crop local images in your browser.
Image Rotate Flip
Rotate and flip local images with canvas.
Image Metadata Viewer
View basic local image metadata.
Text Tools
Text editing, counting and formatting tools.
Word Frequency Counter
Count word frequency and text statistics.
Reading Time Calculator
Estimate reading time from text.
Word Counter
Count words, characters and paragraphs online.
Case Converter
Convert text to uppercase, lowercase and title case.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text.
Slug Generator
Generate URL-friendly slugs from text.
Remove Duplicate Lines
Remove duplicate lines from text.
Sort Lines
Sort lines alphabetically online.
Text Reverser
Reverse text, words, or lines online.
Whitespace Cleaner
Clean extra spaces and empty lines from text.
Text Diff Checker
Compare two blocks of text line by line.
Developer Tools
Developer utilities for coding, formatting and encoding.
Base64 Encoder
Encode and decode Base64 online.
JSON Formatter
Format and beautify JSON online.
JSON Validator
Validate JSON and show formatted output.
JSON Minifier
Validate and minify JSON online.
Case Style Converter
Convert text into common code case styles.
UUID Generator
Generate random UUID instantly.
JWT Decoder
Decode JWT headers and payloads online.
URL Encoder Decoder
Encode and decode URLs online.
Markdown Previewer
Preview Markdown text online.
HTML Formatter
Format and minify HTML online.
CSS Formatter
Format and minify CSS online.
XML Formatter
Format and minify XML online.
XML to JSON Converter
Convert simple XML to JSON online.
HTML Minifier
Minify HTML while preserving quoted attributes.
CSS Minifier
Minify CSS while preserving strings.
JavaScript Formatter
Format and minify JavaScript online.
Regex Tester
Test regular expressions online.
URL Parser
Parse URLs into protocol, host, path, query, and hash.
Query String Parser
Parse query strings into readable key value pairs.
HTTP Status Code Reference
Search common HTTP status codes and meanings.
MIME Type Lookup
Look up common MIME types by extension.
CSV to JSON Converter
Convert CSV rows to a JSON array online.
JSON to CSV Converter
Convert a JSON array of objects to CSV online.
YAML to JSON Converter
Convert simple YAML to JSON online.
JSON to YAML Converter
Convert JSON to simple YAML online.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
HTML Entity Encoder Decoder
Encode and decode HTML entities online.
Text to Binary Converter
Convert text to binary online.
Binary to Text Converter
Convert binary to text online.
Utility Tools
Simple everyday online utilities.
Calculator
Simple online calculator.
QR Code Generator
Generate scannable QR codes online.
File Size Converter
Convert file sizes between common units.
File Name Cleaner
Clean one or many file names online.
Unit Converter
Convert length, weight, temperature, and data size units.
List Randomizer
Shuffle list items randomly.
Converter Tools
Conversion tools for numbers, formats and everyday values.
Calculator Tools
Calculators for percentages, numbers and everyday math.
Percentage Calculator
Calculate percentages, ratios, and percent changes.
Loan Calculator
Estimate monthly loan payments and total interest.
Mortgage Calculator
Estimate monthly mortgage payments.
Compound Interest Calculator
Estimate compound growth over time.
ROI Calculator
Calculate investment gain or loss and ROI percentage.
Profit Margin Calculator
Calculate gross profit, margin, and markup.
Discount Calculator
Calculate sale discounts, tax, and final price.
SEO Tools
SEO tools for metadata, slugs and search optimization.
Meta Tag Generator
Generate HTML meta tags for SEO pages.
Open Graph Tag Generator
Generate Open Graph and Twitter card tags.
Robots.txt Generator
Generate robots.txt rules online.
Canonical URL Checker
Compare current and canonical URLs locally.
Marketing Tools
Campaign tracking and marketing URL tools.
Color Tools
Color conversion and design tools.
Date Time Tools
Date, time, timezone and timestamp tools.
Timestamp Converter
Convert Unix timestamps to readable dates.
Age Calculator
Calculate age from a birth date.
Date Difference Calculator
Calculate the difference between two dates.
Time Zone Converter
Convert date and time between common time zones.
Unix Timestamp Batch Converter
Convert multiple Unix timestamps at once.
Security Tools
Security tools such as passwords, hashes and tokens.
3D Printing Tools
3D printing calculators for filament, scaling, flow and print cost estimates.
Pixel Knock Grid Generator
Upload an image and generate a 3D printable pixel grid STL for pixel craft blocks. All processing runs locally in your browser.
Filament Cost Calculator
Estimate filament cost from spool price, spool weight, model weight, and waste.
Print Time Cost Calculator
Estimate 3D print cost from print time, machine rate, material, labor, and margin.
Filament Length Calculator
Estimate filament length from weight, diameter, and material density.
3D Print Weight Calculator
Estimate filament weight from length, diameter, and material density.
Scale Percentage Calculator
Calculate slicer scale percentages from original and target sizes.
Nozzle Flow Rate Calculator
Calculate volumetric flow rate from layer height, line width, and speed.
Filament Price Comparison Calculator
Compare filament prices across regions and currencies.
3D Model Search Aggregator
Generate outbound search links for popular 3D model platforms.
3D Print Time and Filament Estimator
Estimate filament usage, material cost, flow rate, and print time.
Support Material Cost Calculator
Estimate main and support material costs for 3D prints.
Filament Spool Remaining Calculator
Estimate remaining filament weight, length, value, and print count.
Build Plate Fit Calculator
Check whether a model fits a printer build plate.