Practical tools for Central London businesses

Convert CSV data to clean JSON instantly. Paste or upload.

Convert JSON arrays to CSV format with proper escaping.

Convert YAML files to JSON format online.

Convert JSON objects to clean YAML output.

Parse XML documents and convert them to structured JSON.

Convert tab-separated values to comma-separated format.

Render markdown text as HTML markup in real time.

Extract clean markdown from HTML content.

Encode text to Base64 or decode Base64 back to text.

Percent-encode URLs and query strings safely.

Convert hexadecimal colors to RGB, HSL, and CSS formats.

Convert RGB color values to hex color codes.

Convert Unix timestamps to human-readable dates and vice versa.

Decode binary strings into readable text.

Encode text into binary representation.

Quick temperature conversion between Celsius and Fahrenheit.

Convert kilometers to miles and back instantly.

Convert kilograms to pounds for weight tracking.

Convert inches to centimeters precisely.

Convert liters to US gallons (and imperial).

Extract plain text from PDF documents in your browser.

Encode images as Base64 data URIs for embedding.

Convert SQL INSERT statements to JSON arrays.

Generate SQL INSERT statements from CSV data.

Convert GeoJSON geographic data to KML format for maps.

Calculate your ideal hourly rate based on expenses, taxes, and billable hours.

Estimate UK self-assessment tax and National Insurance contributions.

Compare take-home pay inside vs outside IR35.

Calculate UK dividend tax across bands for the current year.

Estimate CGT on asset disposals including allowances.

Calculate SDLT for property purchases in England and NI.

Estimate IHT liability including nil-rate bands and reliefs.

Add or remove VAT at any rate with a single input.

See how extra payments shorten your mortgage term.

Project compound growth on savings and investments.

Calculate return on investment percentage and annualised ROI.

Find your break-even point from fixed costs, price, and variable cost.

Calculate gross margin, markup, and profit per unit.

Convert hourly rates to annual salary equivalents.

Convert annual salary to equivalent hourly rate.

Calculate monthly repayments using amortisation formula.

Plan debt repayment using the snowball method.

Project retirement savings based on contributions and growth.

Estimate body fat using the US Navy method.

Calculate Body Mass Index with healthy range indicators.

Calculate TDEE and calorie targets for weight loss goals.

Calculate protein, carb, and fat targets for fitness goals.

Estimate due date from last menstrual period or conception date.

Calculate exact age in years, months, and days.

Calculate days, weeks, months between two dates.

Generate v4 UUIDs instantly with bulk generation support.

Generate cryptographically secure passwords with custom rules.

Create QR codes for URLs, text, WiFi, and contact cards.

Generate placeholder text in paragraphs, sentences, or words.

Convert titles into SEO-friendly URL slugs.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.

Generate random integers within a specified range.

Generate EAN-13, UPC-A, Code 128 barcodes as SVG/PNG.

Create scannable QR codes for WiFi network credentials.

Generate contact card QR codes compatible with phone contacts.

Build cron expressions visually with human-readable descriptions.

Test regular expressions against sample text in real time.

Generate favicons in multiple sizes from an uploaded image.

Generate OpenGraph, Twitter Card, and SEO meta tags.

Create robots.txt rules with common crawler configurations.

Generate XML sitemaps from URL lists.

Generate .htaccess redirect rules for Apache servers.

Generate nginx server block configurations.

Generate Dockerfiles for common language stacks.

Generate .gitignore files for popular frameworks.

Count words, characters, sentences, paragraphs, and reading time.

Convert between UPPER, lower, Title, camelCase, snake_case, kebab-case.

Compare two texts and highlight differences line by line.

Remove duplicate lines from lists while preserving order.

Sort lines alphabetically, by length, or numerically.

Perform bulk find-and-replace across multi-line text.

Remove trailing spaces, blank lines, and normalise whitespace.

Reverse characters, words, or lines of text.

Convert typed text into handwriting-style font images.

Convert text to Unicode fancy fonts for social media bios.

Generate relevant hashtags from keywords for social media.

Translate words into emoji sequences and back.

Generate acronyms and initialisms from phrases.

Check whether text reads the same forwards and backwards.

Analyse Flesch-Kincaid reading ease and grade level.

Decode and inspect JWT tokens (header, payload, expiry).

Pretty-print and validate JSON with syntax highlighting.

Minify JSON by removing unnecessary whitespace.

Translate cURL commands to JavaScript fetch() calls.

Searchable reference for all HTTP status codes and meanings.

Parse user agent strings to identify browser, OS, device.

Look up geolocation, ISP, and ASN for IP addresses.

Query A, AAAA, MX, TXT, CNAME records for any domain.

Check certificate validity, expiry dates, and chain issues.

Parse cron expressions and show next execution times.

Create professional invoices with line items and totals.

Convert currencies using live exchange rates.

Split bills and calculate tips per person.

Add or remove sales tax for US states.

Estimate take-home pay after federal/state deductions.