Free online tools, converters, and calculators
Quick pages for development, text, SEO, calculators, media tools, and focused one-task utilities.
Quick access
535 tools ยท 8 categories
Developer Tools
Format, inspect, compare, and decode common developer payloads.
Encoding & Security
Encode strings, generate secure values, and inspect tokens safely.
Text Tools
Clean content, transform copy, and convert common text formats.
Design & Assets
Generate gradients, favicons, SVG snippets, and color conversions.
Calculators
Answer quick percentage, storage, age, and finance questions.
Germany & Regional
Use Germany-focused calculators for salary, tax, loyalty points, and local pricing.
AI generators
UI workspace
Featured tools
Browse directoryJSON Formatter
Pretty-print raw JSON with configurable indentation.
JSON Diff
Compare two JSON documents and list what changed.
JWT Decoder
Decode JWT header and payload without verifying the signature.
Regex Tester
Run a regular expression against sample text and inspect matches.
Base64 Encode / Decode
Encode plain text into Base64 or decode it back.
Word Counter
Count words, characters, lines, and reading time.
Markdown to HTML
Convert common Markdown into HTML preview output.
Color Converter
Convert between HEX, RGB, and HSL color formats.
AI Search Assistant
Use free AI + Wikipedia search to answer questions with sources.
Openverse Image Search
Find free-licensed images from Openverse API.
CV Maker PDF
Build and download a one-page CV as PDF with your photo.
Weather Forecast
Get a clean forecast for any city.
All tools
85 tools
JSON Formatter
Pretty-print raw JSON with configurable indentation.
JSON Validator
Validate JSON and get a clean parse result.
JSON Minifier
Compress JSON into a single-line payload.
JSON Diff
Compare two JSON documents and list what changed.
JWT Decoder
Decode JWT header and payload without verifying the signature.
Regex Tester
Run a regular expression against sample text and inspect matches.
SQL Formatter
Make messy SQL readable with keyword casing and line breaks.
Query String Parser
Parse search params into readable JSON.
Cron Expression Parser
Explain what a cron expression means in plain language.
HTTP Status Lookup
Look up the meaning of a response status code.
URL Parser
Break a URL into host, path, query, hash, and origin parts.
28 tools
Base64 Encode / Decode
Encode plain text into Base64 or decode it back.
URL Encode / Decode
Encode or decode strings for safe query parameter usage.
Hash Generator
Create MD5, SHA-1, SHA-256, or SHA-512 hashes.
HMAC Generator
Sign content with a shared secret using common HMAC algorithms.
HTML Escape / Unescape
Escape raw HTML entities or decode them back into characters.
UUID Generator
Generate one or more RFC 4122 v4 UUIDs.
Password Generator
Generate random passwords with adjustable character sets.
Hex Encode / Decode
Encode UTF-8 text to hexadecimal or decode hex back to text.
Binary Encode / Decode
Encode text to binary bytes or decode binary to text.
Random String Generator
Generate random strings for tokens, IDs, and test fixtures.
Checksum Verifier
Generate a checksum and compare against expected value.
209 tools
Word Counter
Count words, characters, lines, and reading time.
Case Converter
Convert text between lower, upper, title, camel, snake, and more.
Slug Generator
Turn titles into clean, SEO-friendly URL slugs.
Text Diff
Compare two versions of text line by line.
Duplicate Line Remover
Remove repeated lines while preserving the first occurrence.
Whitespace Cleaner
Trim spaces, collapse blank lines, or normalize messy text blocks.
Markdown to HTML
Convert common Markdown into HTML preview output.
CSV to JSON
Parse CSV rows into JSON objects.
JSON to CSV
Convert JSON arrays into CSV rows.
Meta Title Preview
Preview an SEO title with live character guidance.
Meta Description Preview
Preview description length and how it may appear in search results.
75 tools
Color Converter
Convert between HEX, RGB, and HSL color formats.
CSS Gradient Generator
Generate a linear gradient and copy the CSS instantly.
Favicon Generator
Create a simple SVG favicon from initials and brand colors.
SVG Optimizer
Strip comments and collapse whitespace in SVG markup.
CSS Minifier
Minify CSS by removing comments and extra whitespace.
CSS Formatter
Pretty-print CSS with readable indentation.
SVG to Data URI
Convert SVG markup into a CSS-ready data URI.
Color Palette Generator
Generate lighter and darker shades from a base color.
Contrast Checker
Calculate WCAG contrast ratio between two colors.
Box Shadow Generator
Generate CSS box-shadow values with custom offsets and blur.
Border Radius Generator
Generate border-radius CSS from corner values.
98 tools
Percentage Calculator
Solve common percentage questions from one compact form.
Age Calculator
Calculate age in years, months, and days.
Bytes Converter
Convert storage values across bytes, KB, MB, GB, and TB.
Loan Payment Calculator
Estimate monthly payment, interest, and total repayment.
BMI Calculator
Calculate body mass index and weight category.
BMR & TDEE Calculator
Estimate daily calories from age, body metrics, and activity.
Compound Interest Calculator
Calculate future value with recurring monthly contributions.
Discount Calculator
Calculate final price after discount and optional tax.
Tip Calculator
Split bill totals with tip across multiple people.
Date Difference Calculator
Calculate exact difference between two dates.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin.
6 tools
Germany Gross to Net Salary Calculator
Estimate monthly net salary from gross pay with German employee deduction defaults.
Germany Net to Gross Salary Calculator
Estimate monthly gross salary from a target net amount with German deduction defaults.
Germany PAYBACK Points Calculator
Estimate PAYBACK points and redemption value from spend and bonus multipliers.
Germany VAT Calculator
Add or remove the standard or reduced German VAT rates.
Germany Church Tax Calculator
Estimate annual and monthly church tax from your income tax amount.
Germany Solidarity Surcharge Calculator
Estimate the solidarity surcharge from your income tax amount.
10 tools
AI Search Assistant
Use free AI + Wikipedia search to answer questions with sources.
AI Content Brief Generator
Generate a fast SEO content brief from a keyword using a free AI API.
AI Keyword Ideas
Generate long-tail keyword ideas with search-intent grouping.
Wikipedia Page Summary
Look up a Wikipedia summary in multiple languages.
Wikipedia Search Explorer
Search Wikipedia articles and inspect results quickly.
AI Text Summarizer
Summarize long text into concise bullet points.
AI Paraphraser
Rewrite text in a new tone while keeping the original meaning.
AI Mermaid Diagram Generator
Turn a prompt into Mermaid diagram code with AI help.
Prompt Starter Ideas
Generate AI prompt starter ideas.
Image Prompt Ideas
Generate image generation prompt ideas.
24 tools
Openverse Image Search
Find free-licensed images from Openverse API.
Commons Video Search
Search free videos from Wikimedia Commons.
AI Image Generator
Generate images from prompts using a free public API.
Image Resizer
Resize images locally in the browser without uploading them anywhere.
Image Format Converter
Convert PNG, JPG, WEBP, or GIF frames to a new format in the browser.
Image Compressor
Shrink images in the browser by resizing and adjusting export quality.
Image Cropper
Crop a selected region from an image in the browser.
Image Metadata Stripper
Re-export an image locally to remove embedded metadata.
Image Rotator / Flipper
Rotate or flip an uploaded image locally in the browser.
Video oEmbed Inspector
Fetch metadata and preview for supported video URLs.
Video Frame Extractor
Grab a frame from an uploaded video locally in the browser.