Practical tools for
life and work in Thailand
Use a fully localized English interface for every listed tool. No account required, and form values stay on your device whenever possible.
Every listed tool has English labels, guidance, limitations and source context.
Calculations and file work run in your browser whenever possible.
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134 tools found
Percentage and discount calculator
Calculate a percentage, ratio, change or discount with a visible formula.
Reviewed · General utilityOpen toolDate difference calculator
Count Gregorian calendar days with an optional inclusive end date.
Reviewed · Check before reuseOpen toolJSON formatter and syntax validator
Format or minify JSON locally while preserving original numeric tokens.
Reviewed · General utilityOpen toolUTF-8 Base64 text converter
Encode or decode standard Base64 text locally, including Thai and emoji.
Reviewed · General utilityOpen toolAdult BMI calculator — WHO global reference
Calculate BMI for adults aged 20+ using the WHO global adult thresholds.
Limited scope · Preliminary referenceOpen toolAdult BMR and daily energy range
Estimate adult BMR and a TDEE range from FAO/WHO/UNU equations and PAL bands.
Limited scope · Preliminary referenceOpen toolLength, mass and temperature converter
Convert common SI length and mass units plus Celsius, Fahrenheit and Kelvin.
Reviewed · Check before reuseOpen toolThai full tax-invoice particulars checklist
Check visible particulars against Revenue Code section 86/4 without uploading the document.
Limited scope · Preliminary referenceOpen toolDBD business-registration readiness checklist
Track six general DBD Biz Regist stages without entering personal data or uploading documents.
Limited scope · Preliminary referenceOpen toolThai service years and annual-leave reference
Count completed service years and show the general Section 30 minimum without calculating remaining leave.
Limited scope · Preliminary referenceOpen toolQuotation PDF generator
Create a general quotation locally from parties, line items, prices and your terms.
Limited scope · Check before reuseOpen toolPurchase order PDF generator
Create a general purchase order locally from buyer, seller, line items and terms.
Limited scope · Check before reuseOpen toolURL component encoder and decoder
Percent-encode or decode one URI component locally.
Reviewed · General utilityOpen toolUnix timestamp converter
Convert Unix seconds or milliseconds to UTC ISO 8601 and Bangkok time.
Reviewed · Check before reuseOpen toolHTML entity encoder and decoder
Encode or decode five canonical HTML character references locally.
Reviewed · General utilityOpen toolUUID v4 generator
Generate a version 4 UUID locally from Web Crypto random bytes.
Reviewed · General utilityOpen toolSHA-256 generator
Create a SHA-256 digest from UTF-8 text locally.
Reviewed · General utilityOpen toolSHA and MD5 hash generator
Generate SHA-384, SHA-512 or legacy MD5 hashes locally.
Reviewed · General utilityOpen toolRegular expression tester
Test JavaScript regular expressions in a timed Web Worker.
Reviewed · General utilityOpen toolJWT decoder
Decode JWT header and payload without verifying its signature.
Reviewed · Check before reuseOpen toolLine text diff
Compare added, removed and unchanged lines locally.
Reviewed · General utilityOpen toolYAML formatter and validator
Parse and format YAML 1.2 while checking duplicate keys.
Reviewed · General utilityOpen toolXML formatter and validator
Validate and format well-formed XML with DOCTYPE blocked.
Reviewed · General utilityOpen toolHTTP status reference
Look up an HTTP code name and category from the IANA registry.
Reviewed · General utilityOpen toolLive HTTP status checker
Check a public URL's live HTTP response status without following redirects.
Reviewed · Check before reuseOpen toolURL component parser
Parse an HTTP(S) URL into protocol, host, port, path, query and fragment without opening it.
Reviewed · General utilityOpen toolPassword readiness checker
Check password length, normalization and a small local common-password list.
Reviewed · General utilityOpen toolUTM URL builder
Add UTM campaign parameters while preserving existing query values.
Reviewed · General utilityOpen toolMeta tag generator
Generate basic title, description, canonical and Open Graph markup.
Reviewed · General utilityOpen toolWebApplication schema generator
Generate basic WebApplication JSON-LD.
Reviewed · General utilityOpen toolrobots.txt generator
Generate user-agent, allow, disallow and sitemap directives.
Reviewed · Check before reuseOpen toolXML sitemap generator
Create an XML sitemap urlset from up to 500 URLs.
Reviewed · Check before reuseOpen toolThai stamp duty estimator
Estimate Thai stamp duty for four explicitly supported instrument types.
Limited scope · Preliminary referenceOpen toolThai specific business tax calculator
Calculate specific business tax and the local tax add-on from a checked revenue base and rate.
Limited scope · Preliminary referenceOpen toolThai late-tax surcharge calculator
Calculate the 1.5% monthly-or-part surcharge from a user-confirmed period count.
Limited scope · Preliminary referenceOpen toolSentence and paragraph counter
Count sentence segments and blank-line paragraphs locally.
Reviewed · General utilityOpen toolDuplicate line remover
Remove duplicate lines after trimmed NFC comparison.
Reviewed · General utilityOpen toolWhitespace cleaner
Collapse horizontal spaces and excessive blank lines locally.
Reviewed · General utilityOpen toolThai Unicode text normalizer
Normalize text to Unicode NFC locally.
Reviewed · General utilityOpen toolThai slug generator
Create a lowercase Unicode slug that keeps Thai and international letters.
Reviewed · General utilityOpen toolThai Buddhist Era date formatter
Format a valid Gregorian date with a Thai month and Buddhist Era year.
Reviewed · Check before reuseOpen toolInteger to Thai words
Convert an integer of up to 12 digits to deterministic Thai words.
Reviewed · General utilityOpen toolPunctuation spacing normalizer
Normalize spacing around ASCII punctuation without changing words.
Reviewed · General utilityOpen toolThai line-break helper
Insert zero-width spaces at browser-detected Thai word boundaries.
Reviewed · General utilityOpen toolThai heading formatter
Clean heading whitespace and capitalize the first Latin letter without altering Thai words.
Reviewed · General utilityOpen toolSimple interest calculator
Calculate non-compounding interest from principal, annual rate and time.
Limited scope · Preliminary referenceOpen toolCompound interest calculator
Calculate principal growth for a selected compounding frequency.
Limited scope · Preliminary referenceOpen toolBreak-even point calculator
Estimate break-even units from fixed cost, unit price and variable unit cost.
Limited scope · Check before reuseOpen toolROI calculator
Calculate return on investment from proceeds and investment cost.
Limited scope · Check before reuseOpen toolROAS calculator
Calculate conversion value divided by advertising spend.
Limited scope · Check before reuseOpen toolDCA calculator
Model equal monthly investments using an assumed annual return.
Limited scope · Preliminary referenceOpen toolDividend yield calculator
Calculate annual dividends per share as a percentage of the entered share price.
Limited scope · Preliminary referenceOpen toolStock return calculator
Calculate holding return from starting price, ending price and dividends.
Limited scope · Preliminary referenceOpen toolInflation scenario calculator
Project a future cost using an assumed annual inflation rate.
Limited scope · Preliminary referenceOpen toolSavings goal calculator
Calculate a monthly saving amount without investment growth.
Limited scope · Preliminary referenceOpen toolEmergency fund calculator
Set a reserve target from essential expenses and a user-selected number of months.
Limited scope · Preliminary referenceOpen toolDebt priority planner
Order three debts by highest rate or smallest balance.
Limited scope · Preliminary referenceOpen toolCredit card payoff calculator
Estimate payoff months and interest from a balance, APR and fixed payment.
Limited scope · Preliminary referenceOpen toolRetirement savings planner
Model savings to a target age from starting balance, monthly deposits, assumed return, fees and inflation.
Limited scope · Preliminary referenceOpen toolMulti-debt payoff planner
Model avalanche or snowball payoff using fixed minimums and an extra monthly amount.
Limited scope · Preliminary referenceOpen toolReference exchange-rate converter
Convert currencies with the latest available ECB reference rates and data date.
Limited scope · Preliminary referenceOpen toolProfit margin calculator
Calculate profit, margin and markup from revenue and cost.
Limited scope · Check before reuseOpen toolCommission calculator
Calculate commission and remaining proceeds from an entered rate.
Limited scope · Check before reuseOpen toolMarketplace fee calculator
Combine platform, payment and fixed fees using rates from the seller's account.
Limited scope · Check before reuseOpen toolFreelance hourly rate calculator
Calculate a baseline hourly rate from target income, expenses and billable hours.
Limited scope · Check before reuseOpen toolProject quote calculator
Combine labor, expenses and a user-selected contingency.
Limited scope · Check before reuseOpen toolUser-rate shipping fee calculator
Combine a base shipping fee, excess-weight rate, surcharge and discount using user-entered rates.
Limited scope · Check before reuseOpen toolMonthly expense tracker
Total six monthly expense categories, compare them with take-home income and show the remaining amount without storing entries.
Limited scope · Preliminary referenceOpen toolThai section 40(1) and 40(2) income tax
Combine employment and qualifying service income using their shared expense cap.
Limited scope · Preliminary referenceOpen toolAge calculator
Calculate calendar age in years, months, days and total days.
Reviewed · Check before reuseOpen toolTip calculator
Calculate a tip and total from an entered percentage.
Reviewed · General utilityOpen toolBill split calculator
Split a total equally among a whole number of people.
Reviewed · General utilityOpen toolDiscount calculator
Calculate savings and the price after a percentage discount.
Reviewed · General utilityOpen toolAverage calculator
Calculate an arithmetic mean from a list of numbers.
Reviewed · General utilityOpen toolFuel cost calculator
Estimate fuel volume and cost from distance and fuel economy.
Reviewed · Check before reuseOpen toolSpeed distance time calculator
Solve one motion value from two others at constant speed.
Reviewed · Check before reuseOpen toolCooking volume converter
Convert mL, L, teaspoons, tablespoons and a declared 240 mL cup.
Reviewed · Check before reuseOpen toolRandom integer generator
Generate an integer in a selected range with Web Crypto.
Reviewed · General utilityOpen toolDate countdown calculator
Count UTC calendar days between two dates.
Reviewed · Check before reuseOpen toolRandom list picker
Pick one list item with Web Crypto without sending the list anywhere.
Reviewed · General utilityOpen toolUTC timezone converter
Display one UTC instant in a selected IANA time zone.
Reviewed · Check before reuseOpen toolStopwatch
Time intervals and record laps locally with a monotonic clock.
Reviewed · General utilityOpen toolAdult blood-pressure reference
Compare one adult reading with the 2025 AHA categories and severe-reading guidance.
Limited scope · Preliminary referenceOpen toolAdult sleep-duration reference
Compare sleep in a 24-hour period with the CDC duration published for an adult age band.
Limited scope · Preliminary referenceOpen toolAdult waist-to-height reference
Calculate waist-to-height ratio using NICE adult classifications when BMI is below 35 kg/m².
Limited scope · Preliminary referenceOpen toolAdult resting heart-rate reference
Compare one resting pulse with the common AHA adult reference of 60–100 beats per minute.
Limited scope · Preliminary referenceOpen toolImage cropper
Crop JPG, PNG or WebP locally using explicit pixel bounds.
Reviewed · General utilityOpen toolImage merger
Combine up to 10 images vertically or horizontally in the browser.
Reviewed · General utilityOpen toolImage metadata remover
Show basic file facts and re-encode pixels through canvas to remove non-pixel metadata.
Reviewed · General utilityOpen toolPDF merger
Merge 2–5 PDFs in selected order locally.
Reviewed · General utilityOpen toolPDF page splitter
Split a PDF into one-page files for individual download.
Reviewed · General utilityOpen toolPDF text extractor
Extract the text layer from up to 50 PDF pages without OCR.
Reviewed · General utilityOpen toolB.E. ↔ C.E. year converter
Convert Thai Buddhist Era and Common Era years.
Reviewed · Check before reuseOpen toolThai character and word counter
Count Thai characters, graphemes, words and lines locally.
Reviewed · General utilityOpen toolThai ↔ Arabic numeral converter
Convert Thai and Arabic digits while preserving surrounding text.
Reviewed · General utilityOpen toolThai ID number format checker
Check the length and check digit without sending the number anywhere.
Reviewed · Check before reuseOpen toolThai government abbreviation expander
Expand common Thai address and local-government abbreviations.
Reviewed · General utilityOpen toolGPA calculator
Calculate GPA from course credits and grades on a 0–4 scale.
Reviewed · Check before reuseOpen toolRai, ngan and square wah converter
Convert traditional Thai land units to square metres.
Reviewed · Check before reuseOpen toolVAT add/remove calculator
Split an amount into price before VAT, VAT and total.
Reviewed · Preliminary referenceOpen toolThai withholding tax calculator
Estimate withholding tax and the net payment.
Reviewed · Preliminary referenceOpen toolThai personal income tax estimator
Estimate progressive personal income tax from salary and the supported deductions for the displayed tax year.
Reviewed · Preliminary referenceOpen toolThailand social security contribution estimator
Estimate a Section 33 employee contribution using the displayed wage base, period and confirmed regional relief eligibility.
Reviewed · Preliminary referenceOpen toolPromptPay QR generator
Create a PromptPay payment QR locally on your device.
Reviewed · Check before reuseOpen toolOfficial Thailand Post search
Prepare Thai place-name terms and open the result in the official Thailand Post postcode search.
Reviewed · Check before reuseOpen toolThai tax ID format checker
Check the structure and check digit of a 13-digit Thai tax ID.
Reviewed · Check before reuseOpen toolThailand severance pay estimator
Estimate statutory severance from final monthly wage and service length.
Reviewed · Preliminary referenceOpen toolThai property transfer fee estimator
Estimate selected general fees and taxes for a Thai land or home transfer.
Reviewed · Preliminary referenceOpen toolThai financial-institution holiday and leave planner
Review the displayed 2026 financial-institution holidays and count working leave days.
Reviewed · Preliminary referenceOpen toolOfficial Thai province Romanization
Look up the official Roman-script spelling of all 77 Thai province names.
Reviewed · Check before reuseOpen toolCommon Thai spelling checker
Find a practical set of frequently misspelled Thai words.
Reviewed · General utilityOpen toolThai alphabetical sorter
Sort Thai names and lines using Thai locale rules.
Reviewed · General utilityOpen toolReducing-balance loan calculator
Estimate equal instalments and total interest for a fixed-rate amortizing loan.
Reviewed · Preliminary referenceOpen toolThai vehicle-tax due date and surcharge
Count days and estimate the 1% late annual-tax surcharge from a user-confirmed month-or-part count.
Reviewed · Preliminary referenceOpen toolThailand net salary estimator
Estimate 2026 take-home pay after the supported Section 33 contribution and personal-income-tax calculation.
Reviewed · Preliminary referenceOpen toolThailand household electricity estimator
Estimate a residential bill using the displayed home tariff and September–December 2026 Ft period.
Reviewed · Preliminary referenceOpen toolEffective annual rate calculator
Estimate an effective annual borrowing cost from net proceeds and equal monthly payments.
Reviewed · Preliminary referenceOpen toolLocal password generator
Generate a random password on your device.
Reviewed · General utilityOpen toolLocal image compressor
Reduce image file size without uploading it to the server.
Reviewed · General utilityOpen toolPDF and image converter
Create a PDF from images or render PDF pages as images locally.
Reviewed · General utilityOpen toolPrivate share-link generator
Create a shareable link that reveals and confirms the destination without storing it in a database.
Reviewed · Check before reuseOpen toolLocal QR code generator
Create a QR code from text or a URL on your device.
Reviewed · General utilityOpen toolThai invoice generator
Create a general downloadable invoice for freelance or small-business work.
Reviewed · Preliminary referenceOpen toolThai receipt generator
Create a general receipt and download it as a PDF.
Reviewed · Preliminary referenceOpen toolSelling price and margin calculator
Estimate a selling price from cost, target profit and platform fees.
Reviewed · Check before reuseOpen toolThai billing note generator
Create a general payment request and download it as a PDF.
Reviewed · Preliminary referenceOpen toolThai delivery note generator
Create a general delivery record for goods or freelance work.
Reviewed · Preliminary referenceOpen toolThai business-day calculator
Count weekdays after excluding dates you provide.
Reviewed · Check before reuseOpen toolThai and English address formatter
Arrange Thai or English address lines for copying and labels.
Reviewed · Check before reuseOpen tool50 Tawi data preparation checklist
Validate core preparation fields before using the Revenue Department certificate process.
Reviewed · Preliminary referenceOpen toolEstimated payslip summary
Estimate 2026 take-home pay and download a private summary.
Reviewed · Preliminary referenceOpen toolThai tax and social-security deadline hub
Open the latest official filing calendars without relying on copied due dates.
Reviewed · Preliminary referenceOpen toolThai land price per unit calculator
Convert a total land price into price per rai, square wah and square metre.
Reviewed · Check before reuseOpen toolSmall-store document workflow
Move from selling price and VAT to invoice, receipt and delivery note.
Reviewed · General utilityOpen toolYour tools
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