Invoice Generator
Create, preview and download clean PDF invoices.
Open toolRuns in your browser
Free tools. Real utility.
Less busywork.
More building.
Practical tools for developers, founders and growing businesses.
- Free to use
- No sign-up to get started
- Processing details are shown on each tool
Find your next shortcut.
24 tools for everyday work.
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24 tools
Image Compressor
Compress and resize JPG, PNG and WebP images in batches.
Open toolRuns in your browserSEO Audit
Check titles, meta tags, headings and links on any page.
Open toolBrowser + server requestSecurity Header Checker
See which HTTP security headers a site sends.
Open toolBrowser + server requestIncome Tax Calculator FY 2025-26
Compare India's old and new tax regimes for FY 2025-26.
Open toolBrowser + server requestPDF Compressor
Make PDFs smaller on your own device.
Open toolRuns in your browserColor Palette Generator
Generate palettes and export HEX, CSS or Tailwind colors.
Open toolRuns in your browserDiff Checker
Compare code or text side by side with inline highlights.
Open toolRuns in your browserJSON to TOON Converter
Convert JSON into compact TOON for LLM prompts.
Open toolRuns in your browserJSON Formatter
Format, validate and minify JSON instantly.
Open toolRuns in your browserJWT Decoder
Decode JWTs locally and verify HMAC signatures.
Open toolRuns in your browserGST / VAT Calculator
Add or remove GST and VAT in one step.
Open toolRuns in your browserEMI / Loan Calculator
Plan loan EMIs, prepayments and total interest.
Open toolRuns in your browserProfit Margin Calculator
Work out margin, markup and break-even.
Open toolRuns in your browserUUID / ULID Generator
Generate secure UUID v4 values and sortable ULIDs.
Open toolRuns in your browserSafe URL Shortener
Create short links for public URLs, kept in your browser.
Open toolRuns in your browserAge & Date Calculator
Exact age and days between any two dates.
Open toolRuns in your browserBMI Calculator
BMI from height and weight, with the WHO adult category.
Open toolRuns in your browserAI Token Counter
Estimate prompt tokens and plan request volume.
Open toolRuns in your browserllms.txt Generator
Build an llms.txt file that guides AI assistants.
Open toolRuns in your browserAI Crawler robots.txt Builder
Allow or block AI crawlers in robots.txt.
Open toolRuns in your browserSchema JSON-LD Generator
Generate schema.org JSON-LD with required-field checks.
Open toolRuns in your browserCron Expression Builder
Build cron schedules and read them in plain English.
Open toolRuns in your browserRegex Tester
Test regular expressions with live match highlights.
Open toolRuns in your browser
Useful on their own. Better together.
Bill with the right tax
Work out the GST or VAT on a line item, then drop the figures into a ready-to-send invoice.
Ship a lighter brand kit
Pick a palette for your site, then compress the hero images that carry it.
Clean data, cheaper prompts
Validate and tidy a JSON payload, then convert it to TOON so it takes fewer tokens in an LLM prompt.
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We build custom tools, integrations and intelligent software.
Before you start
Are these tools free?
Yes. Every tool here is free to use, with no account needed.
Where is my data processed?
Most tools run entirely in your browser, so your files and text never leave your device. SEO Audit, Security Header Checker and Income Tax Calculator FY 2025-26 need a network request to do their job. Each tool page states exactly what is processed where and what, if anything, is sent.
Can I share my results?
Most tools let you copy or download the output. Every tool also has its own link, so you can send a colleague straight to it.
Do I need an account?
No. Open a tool and start using it. There is nothing to sign up for.
What is saved on my device?
Only your saved-tools bookmarks and a few tool settings, kept in your browser's local storage. Clear this site's data in your browser to remove them.
Can you build a custom version for my team?
Yes. We build custom tools, integrations and internal software around how your team already works. Tell us what you need.