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1,185 tools that run entirely in your browser
Calculators and converters for finance, mathematics, engineering, science and everyday work. No account, no server, no tracking — and they keep working when the network does not.
1,185
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100%
Works offline
Popular tools
Image CompressorShrink JPEG, PNG and WebP files with a live quality preview and a before/after size comparison.Merge PDF FilesCombine several PDFs into one, in any order, without uploading anything.JSON Formatter & ValidatorFormat, validate and minify JSON. Pinpoints the exact line and column of any syntax error.Passport & ID Photo MakerCreate correctly sized passport and visa photos, laid out on a printable 4×6 sheet.QR Code GeneratorCreate QR codes for URLs, text, WiFi, contact details and more. Download as SVG or PNG.Currency ConverterConvert between 160+ world currencies using daily reference rates. Rates are cached so it keeps working offline.GST Calculator (India)Add or remove GST at current 2026 slabs, with the CGST, SGST and IGST split for your invoice.Word & Character CounterCount words, characters, sentences and paragraphs, with reading time and keyword density.
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