59 Free Developer & IT Tools Online

Calculate your home connected load and find out the exact solar system size (kW) you need to run your appliances in Pakistan.

Calculate the return on investment and exact payback period for your solar panel system based on current electricity tariffs.

Estimate your monthly electricity bill and net metering savings under current NEPRA import and export tariffs.

Calculate Pakistan income tax liability (Tax Year 2026-2027), compute withholding deductions, reconcile Section 116 Wealth Statement, and file on FBR IRIS before the September 30, 2026 deadline.

Determine if your business is legally required to integrate with the FBR Point of Sale (POS) system under the new SRO 288 rules.

Calculate the true financial impact of an IT outage on your business, including lost productivity, lost revenue, and recovery costs.

Discover how much your business can save by upgrading from expensive traditional phone lines (Analog/ISDN) to a modern IP Telephony system.

Calculate real-time FBR Tier-1 retail POS service fee, provincial GST breakdowns (SRB/PRA/FBR), and compliant customer receipt totals in Pakistan.

Instantly share text, code snippets, and links across devices on the same WiFi network without logging in. Uses serverless public IP grouping for automatic connection.

Calculate exactly how long it will take to download or upload a file based on your internet speed, accounting for TCP/IP network overhead.

Calculate the exact internet bandwidth required for your office IP Telephony and SIP Trunks to ensure crystal-clear calls without dropping.

Determine exactly how many external phone lines (SIP Trunks / Channels) your business needs based on your employee count and call volume.

Instantly format, validate, and minify JSON data with syntax highlighting and error detection. Paste messy JSON and get clean, readable output in one click.

Encode plain text or binary data to Base64 and decode Base64 strings back to readable text. Instant, free, and runs entirely in your browser.

Test and debug regular expressions with real-time match highlighting, group capture display, and flag support. Works with JavaScript regex syntax.

Encode special characters in URLs using percent-encoding, or decode encoded URL strings back to readable text. Essential for web developers and API testing.

Generate cryptographic hashes from any text using MD5, SHA-1, SHA-256, SHA-384, and SHA-512 algorithms. Instant results, runs entirely in your browser.

Decode and inspect JSON Web Tokens (JWT) to view the header, payload, and signature. Instantly see claims, expiry, and token structure without a secret key.

Format, beautify, and minify HTML code with proper indentation and structure. Clean up messy HTML from any source instantly.

Minify and compress CSS code to reduce file size and improve page load speed. Removes whitespace, comments, and redundant code instantly.

Minify and compress JavaScript code to reduce bundle size and improve website performance. Removes whitespace, comments, and unnecessary characters.

Compare two blocks of text side-by-side and highlight additions, deletions, and changes. Perfect for code reviews, document comparison, and version tracking.

Convert Markdown to clean, valid HTML code instantly with a live side-by-side preview. Supports headings, lists, links, images, code blocks, and tables.

Convert single "docker run" CLI commands into multi-service, clean docker-compose.yml files automatically.

Build schedule strings for crontab/Kubernetes jobs using dropdowns, or parse raw cron strings into human-readable English.

Convert pixels (px) to rem units or calculate custom Tailwind CSS spacing classes instantly. Complete with a standard Tailwind CSS Spacing Cheat Sheet.

Prettify and format SQL statements online. Capitalises command clauses, aligns fields, handles brackets, and structure formatting.

AI-powered tool to generate custom, auditor-ready security policies for ISO 27001, SOC 2, and HIPAA compliance. Tailored to your organisation in minutes.

Generate and verify secure Bcrypt password hashes online with custom salt rounds. Essential for developers implementing secure password storage.

Create mathematically secure passwords and instantly test your existing ones against modern brute-force cracking speeds.

Can you spot the dangerous red flags in these simulated phishing emails? Click on the suspicious parts to identify them.

Evaluate your organization's security posture and compliance readiness in 2 minutes with this interactive self-assessment.

Check if your password has been exposed in public data breaches. We use secure k-Anonymity hashing so your password never leaves your browser.

Generate cryptographically secure random tokens for API keys, session IDs, CSRF tokens, and authentication secrets. Choose length and encoding format.

Generate universally unique identifiers (UUIDs) in v1, v4, and v5 formats. Generate single or bulk UUIDs instantly for databases, APIs, and distributed systems.

Generate signed JSON Web Tokens (JWT) with custom header, payload claims, expiry, and secret key. Supports HS256, HS384, and HS512 algorithms.

Check the SSL/TLS certificate validity, expiry date, issuer, and chain details for any domain. Instantly verify if a website's certificate is valid and trusted.

Paste raw email headers and instantly analyse the full delivery path, sender IP, spam scores, authentication results (SPF, DKIM, DMARC), and routing delays.

Generate secure, random API keys with customisable length, prefix, and format. Create production-ready API keys for your applications instantly.

Generate cryptographically secure random numbers within any range. Uses the Web Crypto API for true randomness — suitable for security-sensitive applications.

Check if a JWT token or Unix timestamp has expired. Paste any JWT and instantly see the expiry time, time remaining, and whether the token is still valid.

Generate QR codes from any URL, text, phone number, or email address. Download as PNG instantly. No watermarks, no signup, completely free.

Create professional invoices with your business details, itemised line items, tax, and totals. Download as PDF instantly — no account or subscription needed.

Calculate GST (Goods and Services Tax) for inclusive and exclusive amounts. Supports custom tax rates for Pakistan, India, Australia, and other countries.

Generate a clickable WhatsApp chat link with a pre-filled message for any phone number. Perfect for business websites, social media bios, and marketing.

Calculate monthly EMI payments, total interest, and full repayment schedule for any loan. Supports home loans, car loans, and personal loans.

Calculate percentages, percentage increase or decrease, percentage of a number, and reverse percentage. Multiple calculation modes in one tool.

Convert between units of length, weight, temperature, area, volume, speed, and data. Covers metric, imperial, and other measurement systems.

Calculate your exact age in years, months, and days from your date of birth. Also shows next birthday countdown and total days lived.

Convert time between any two time zones instantly. Supports all global time zones including Pakistan Standard Time (PKT), UTC, EST, PST, IST, and more.

Calculate network subnets, CIDR notation, broadcast addresses, usable host ranges, and wildcard masks. Essential for network engineers and IT admins.

Calculate the exact hard drive storage required for your CCTV system based on camera count, resolution, frame rate, compression, and retention period.

Lookup public DNS records (A, AAAA, MX, TXT, CNAME, NS) for any domain and view global DNS propagation simulation status.

Instantly check your public IPv4 or IPv6 network address, geographic coordinates, location, and internet service provider (ISP) info.

Inspect and parse your browser's current User-Agent string, screen resolution, operating system, and timezone. Paste any custom User-Agent to parse it instantly.

Test your real-time internet download speed, upload speed, ping latency, and jitter — directly from your browser with no plugins needed.

Interactive testbed for automated invoice OCR data extraction, speed-to-lead WhatsApp autoresponders, and dormant lead reactivation pipelines.

Create Google-compliant structured JSON-LD data markup for Local Business, FAQs, Articles, Products, and Job postings to boost search visibility and CTR.

Create search-engine friendly title and meta description tags, Open Graph card tags, and Twitter Card tags. Includes live previews of Google search result snippets and social sharing cards.

Generate standard robots.txt crawler directives and XML sitemaps to guide search engines on indexing and crawling your site structure correctly.

Analyze keyword frequencies and densities to ensure your articles are optimized for Google. Check word counts, character counts, and keyword-stuffing warnings.

Create standard Apache web server .htaccess configuration rules. Generate 301 redirects, force HTTPS protocol, enable GZIP compression, and add security headers.