All tools
Every tool, in one place
The complete catalogue, newest additions included. Each tool does one job, opens instantly, and processes everything on your own device — so the page keeps working after it has loaded, even offline.
The complete catalogue
JSON Formatter
Pretty print, validate and beautify JSON instantly.
Open toolMIME Type Lookup
Find the MIME type for a file extension, or the extensions behind a type.
Open toolUser Agent Parser
Identify the browser, OS, device, engine and bot markers behind a User-Agent.
Open toolRegex Tester
Test patterns against sample text with live match highlighting.
Open toolLoan Eligibility Calculator
Estimate the maximum loan your income could service, before you apply.
Open toolHome Loan EMI Calculator
Calculate your home loan EMI, total interest and repayment, with an amortisation schedule.
Open toolEMI Calculator
Work out monthly instalments, total interest and payoff date.
Open toolSimple Interest Calculator
Calculate simple interest and the total amount from principal, rate and duration.
Open toolCompound Interest Calculator
Estimate compound interest and future value at any compounding frequency.
Open toolBase64 Decoder
Decode Base64 into text, JSON, XML, HTML or an image, with format detection.
Open toolBase64 Encoder
Encode and decode Base64 for text, files and data URIs.
Open toolColor Picker
Pick a colour and convert between HEX, RGB, HSL and OKLCH.
Open toolColor Converter
Convert between HEX, RGB, HSL, HSV and CMYK with live preview and code output.
Open toolCSS Gradient Generator
Create linear, radial and conic CSS gradients visually and copy the code.
Open toolUUID Validator
Validate UUIDs in bulk and detect their version, variant and formatting issues.
Open toolUUID Generator
Generate v1, v4, v6 and v7 identifiers in bulk, and validate existing ones.
Open toolJWT Generator
Build and sign JSON Web Tokens with custom headers, payloads and claims.
Open toolJWT Decoder
Inspect header, payload and expiry without sending the token anywhere.
Open toolImage Compressor
Shrink PNG, JPEG and WebP files with no visible quality loss.
Open toolWord Counter
Count words, characters, sentences and reading time as you type.
Open toolDiff Checker
Compare two blocks of text or code, see what changed, and merge the two.
Open toolOpen Graph Generator
Generate og: meta tags and preview the card a shared link produces.
Open toolMeta Tag Generator
Build a clean <head>: title, description, robots, canonical and viewport.
Open toolPassword Generator & Strength Checker
Create strong passwords and measure entropy, crack time and complexity.
Open toolCron Expression Generator
Build, validate and explain cron expressions, with a preview of the next runs.
Open toolSIP Calculator
Estimate SIP maturity value and wealth gain, with a step-up schedule.
Open toolCAGR Calculator
Calculate compound annual growth rate between any two values over any period.
Open toolCanonical URL Generator
Turn a page URL into a correct, escaped rel=canonical tag.
Open toolRobots.txt Generator
Build crawler rules and sitemap directives, with validation that explains the limits.
Open toolMD5 Generator
Generate and verify MD5 checksums for text or files, entirely in the browser.
Open toolHash Generator
Hash text or files with MD5, SHA-1, SHA-2, SHA-3, BLAKE2 and RIPEMD-160.
Open toolDummy Image Generator
Create placeholder images at any size in PNG, JPG, WebP or SVG.
Open toolBarcode Generator
Create Code 128, EAN, UPC, ISBN and ten other 1D barcodes, ready to print.
Open toolQR Code Generator
Create custom QR codes for links, WiFi, contacts and payments, with a real scan check.
Open toolURL Encoder
Percent-encode URLs, query strings and text for safe transmission.
Open toolURL Decoder
Decode percent-encoded URLs, query strings and text back into readable form.
Open toolTime Zone Converter
Convert and compare times across cities, with DST and meeting planning.
Open toolUnix Timestamp Converter
Convert Unix timestamps to dates and back, in seconds, milliseconds, microseconds or nanoseconds.
Open toolAge Calculator
Work out an exact age in years, months and days from a birth date.
Open toolCSV to JSON
Turn spreadsheet exports into clean, typed JSON records.
Open toolSQL Formatter
Format queries with consistent keyword casing and indentation.
Open toolSQL Minifier
Collapse queries to a single line and strip comments safely.
Open toolHTML Formatter
Pretty print and indent HTML with consistent attribute wrapping.
Open toolCSS Formatter
Format stylesheets with consistent rules, nesting and spacing.
Open toolJavaScript Formatter
Beautify JavaScript and TypeScript with predictable indentation.
Open toolMarkdown to HTML Converter
Convert Markdown to clean, sanitized HTML with a live rendered preview.
Open toolUnit Converter
Convert length, weight, temperature, area, volume, speed, time and data.
Open toolPercentage Calculator
Solve percentage change, share and reverse-percentage problems.
Open toolGST Calculator
Add or strip GST at any rate and split it into CGST, SGST or IGST.
Open toolSlug Generator
Turn any headline into a clean, URL-safe slug, with a live URL preview.
Open toolSitemap Generator
Build a valid XML sitemap with priorities and change frequency.
Open toolYAML Formatter & Validator
Format and validate YAML, with comments preserved and multi-document support.
Open toolHTTP Status Codes
Look up any status code with its meaning and typical use.
Open toolJSON Viewer
Explore large JSON as a collapsible tree with search and copyable paths.
Open toolJSON Minifier
Strip whitespace from JSON and see exactly how many bytes it saved.
Open toolJSON Validator
Check JSON against the spec and get the exact line, column and cause.
Open toolJSON Compare
Diff two JSON documents structurally and see what was added or changed.
Open toolJSON Diff
See what changed between two JSON documents in a Git-style unified diff.
Open toolXML to JSON
Turn XML into clean JSON, with attributes, arrays and namespaces handled.
Open toolJSON to XML
Convert JSON into well-formed XML with custom roots, arrays and attributes.
Open toolJSONPath Tester
Write and test JSONPath expressions against JSON with instant results.
Open toolJSON to CSV
Flatten arrays of objects into a spreadsheet-ready CSV file.
Open toolXML Formatter
Beautify, validate and explore XML with an interactive tree view.
Open tool
How the catalogue is organised
Categories group tools by what they are — a formatter, a calculator, a converter. Collections group them by the job you are doing, which is usually the faster way in when you already know the outcome you want.
What every tool has in common
- It runs in your browser: text, files and figures you enter are processed on your device and never uploaded.
- It works without an account, an email address or a trial period.
- It keeps working offline once the page has loaded, because there is no server call to make.