Free. Browser-based. No signup.
Free tools for money, documents, PDFs & images
For anyone, anywhere: work out an EMI or your tax, make a GST invoice or rent receipt, design a company seal, sign, merge or compress a PDF, or resize a photo — in a minute, without signing up.
- 48finance calculators
- 53bill & invoice formats
- 100stamp templates
- 81PDF tools
- 70image tools
- 34text tools
- 39security tools
- 3utilities
- 30data tools
- 13code tools
- 20converters
- 13web tools
- 0files uploaded — everything runs in your browser
Tools
What people use most
- FinanceGold Rate TodayIndicative India gold prices in INR per gram
- BillsGST InvoiceRule 46–style tax invoice with CGST/SGST or IGST
- StampsCreate StampDesign a company seal or status stamp
- SignaturesSign PDF OnlinePlace signatures and dates on a PDF in your browser
- ImagesCompress ImageShrink JPG, PNG and WebP — or hit an exact KB size
- PDFMerge PDFCombine PDFs and pick pages from each — nothing uploaded
- TextWord CounterCount words, characters, sentences and reading time as you type
- SecurityPassword GeneratorStrong random passwords and passphrases, made in your browser
- UtilitiesRandom Number GeneratorRandom integers or decimals in any range, dice rolls and coin flips
- DataJSON FormatterFormat, validate and minify JSON with line and column errors
- WhistleWhistle - Bookmark Launcher and ManagerChrome extension with aliases, fuzzy search and pinned hotkeys
- FinanceEMI CalculatorMonthly loan EMI, interest and repayment schedule
Workflows
Tools that work together
Move from one real Nelstack tool to the next — bills, signatures, stamps and calculators in a single flow.
Business document workflow
Create a bill, sign the PDF, design a seal, then stamp the document — all in the browser.
Buying a home
Size the home-loan EMI, see what prepaying saves, check if switching lenders helps — and claim HRA while you rent.
HRA proof workflow
Estimate exemption, generate a rent receipt, and add a signature.
What’s new
Recently added
- Web · Web ToolsMeta tag, Open Graph, robots.txt, sitemap and redirect generators in your browser
- Converters · ConvertersUnit, timestamp, time zone, colour and number converters in your browser
- Code · Code ToolsHTML, CSS, JavaScript and SQL formatters and minifiers, regex tester and more in your browser
- Data · Data ToolsJSON formatter, CSV and Excel converters, YAML, XML and TOML in your browser
Questions
About Nelstack
- Is Nelstack free?
- Yes. Every calculator, bill format, stamp, signature, PDF, image and text tool is free to use as often as you need — no account, paywall or watermark.
- Are my documents uploaded?
- No. The PDF, image and text tools — merge, compress, convert, edit, OCR, remove backgrounds, count and clean text and more — run entirely in your browser, and the bill, stamp and signature tools build your PDF or image there too, so your files never leave your device. Contact forms and anonymous analytics are covered in the Privacy page.
- Can anyone use these tools?
- Yes, from anywhere. The PDF, image, text, signature and stamp tools work the same for everyone. The finance calculators, bill formats and metal rates follow Indian rules — income tax regimes, HRA, EPF, PPF, NPS, GST invoices and INR per gram — so use those if you need them for India.
- Who makes Nelstack?
- Nelstack is built and maintained by a small independent team in India. Calculator explanations are reviewed against primary sources such as CBDT, RBI and EPFO; the About page explains how rates are sourced.
Made in India by the Nelstack team · About us · Help & common questions