Free Tools
Developer utilities and business calculators that run entirely in your browser. Nothing you paste, upload or type is sent to our servers.
Developer tools
Everyday utilities for working with code, data and files.
JSON Beautifier
Validate, format and minify JSON
Paste any JSON to instantly validate it, pretty-print it with the indentation you prefer, minify it, sort its keys, or explore it as a collapsible tree.
Open toolHTML/CSS/JS Formatter
Clean up messy code and fix indentation
Paste minified or mangled HTML, CSS, SCSS, LESS, JavaScript, JSX or TypeScript and get it back consistently indented, wrapped and spaced.
Open toolDiff Checker
Compare two texts and see what changed
Paste two versions of any text, code or config file and see the added, removed and modified lines side by side, with the edited words highlighted.
Open toolJWT Decoder
Decode and verify JSON Web Tokens
Paste a JWT to read its header, payload and claims, see whether it has expired, and verify an HS256, HS384 or HS512 signature against your secret.
Open toolHash Generator
MD5, SHA-1, SHA-256 and SHA-512
Generate hashes of any text or file in hex or Base64, sign them with HMAC, and compare the result against a published checksum.
Open toolCron Expression Generator
Build and explain crontab schedules
Write or paste a cron expression to see what it means in plain English, when it will next run, and whether it is valid.
Open toolImage Compressor
Shrink images and convert to WebP
Compress PNG, JPEG, WebP and AVIF images or convert between them, resize them, and see exactly how much you saved — without uploading anything.
Open toolQR Code Generator
Static QR codes that never expire
Turn a link, Wi-Fi network, contact card or message into a QR code, style it with your own colours and logo, and download it as PNG or SVG.
Open toolJSON to CSV
Turn JSON into a spreadsheet
Convert JSON to CSV or Excel, flattening nested objects into readable columns and picking the right array for you — without uploading your data.
Open toolJSON to TypeScript
Generate interfaces from JSON
Paste a JSON sample and get TypeScript interfaces back, with optional keys, unions and nested types inferred from the records you provide.
Open toolBusiness calculators
Tax, payroll and investment figures for running a business in Pakistan.
Salary Tax Calculator
Pakistan income tax on your salary
Enter your monthly or yearly salary to see the income tax and surcharge due under the FBR slabs, your take-home pay, and a slab-by-slab breakdown.
Open toolInvoice Generator
Sales tax invoices with GST
Build a professional invoice with GST, further tax and withholding, state the amount in words, and print it or save it as a PDF.
Open toolGratuity & EOBI Calculator
End-of-service and pension figures
Work out the gratuity due when service ends, an EOBI old-age pension, and what monthly EOBI contributions cost across your headcount.
Open toolERP ROI Calculator
Payback, NPV and IRR for an ERP
Model what an ERP would save against what it would cost, and see the payback period, return on investment, net present value and internal rate of return.
Open toolApp Cost Calculator
What an app costs to build
Pick the features, platforms and design level you need to see the hours behind the estimate, a cost range, a timeline, and the same build priced in five markets.
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