All Free Online Developer Tools

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"Fast and simple — saved me hours." — A developer
Thai Baht Text Converter
Convert numbers to Thai Baht words with satang support.
How to use Enter an amount and press Convert to see the Thai Baht text (baht + satang).
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Thai Date Converter
Convert Buddhist ↔ Gregorian dates.
How to use Select or enter a date and choose direction (B.E.→A.D. or A.D.→B.E.).
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Thai Age Calculator
Compute age precisely (years-months-days).
How to use Enter birthdate and click Calculate to get years, months, days.
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Rai-Ngan-Wa Converter
Convert Thai land units to m²/acres.
How to use Enter value, pick source and target units, then convert.
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PDF Manager
Split, reorder, and preview PDF pages.
How to use Upload PDF, drag to reorder or split pages, then download.
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Merge PDFs
Combine multiple PDFs into one.
How to use Upload multiple PDFs, arrange order, and merge into one file.
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Text Case Converter
Lower/Upper, Title Case, snake_case, kebab-case.
How to use Paste text, choose the target case, and convert.
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Lorem Ipsum Generator
Flexible placeholder text.
How to use Choose number of paragraphs and language, then generate placeholder text.
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Link-in-Bio Generator
Build a quick link hub.
How to use Add links with titles, choose a theme, then save and share your profile.
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Image Resize
Fast image resizing.
How to use Upload an image, choose dimensions or ratio, and download resized image.
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Encoder / Decoder
Base64, URL, and HTML entity encode/decode.
How to use Paste text and pick encode/decode method (Base64, URL, HTML).
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Character Counter
Count characters/words for SEO and social.
How to use Paste text to see character, word, and line counts in real time.
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Key Generator
Generate random keys.
How to use Choose key length and type (hex, base64, alphanumeric), then generate.
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Converter (General)
General unit/value conversions.
How to use Pick conversion category (weight, length, etc.), enter value, and convert.
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Robots.txt Generator
Generate robots.txt with sensible defaults.
How to use Set crawl rules (disallow, allow, crawl-delay) and generate robots.txt.
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Sitemap.xml Generator
Build XML sitemaps for search engines.
How to use Enter or upload URLs, then generate sitemap.xml for submission.
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CSV/JSON → Table
Preview CSV/JSON as a table.
How to use Upload or paste CSV/JSON and preview as a table; export if needed.
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Emoji Free Picker
Browse and copy emojis quickly.
How to use Click an emoji to copy it to your clipboard.
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Business PDF
PDF helpers for business forms.
How to use Pick a tool (form-fill, convert), upload PDF and apply operations.
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CSV ↔ JSON Converter
Convert CSV to JSON and back.
How to use Paste CSV or JSON and click convert to transform formats.
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CSV/JSON Diff & Merge
Diff and merge CSV/JSON.
How to use Upload two files to diff and selectively merge changes.
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WHOIS / IP Lookup
WHOIS and IP lookup.
How to use Enter a domain or IP to retrieve WHOIS and geolocation details.
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Loan Calculator
Compute loan payments and interest.
How to use Enter principal, interest rate, term, and calculate payment schedule.
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JSON Formatter & Validator
Pretty-print and validate JSON.
How to use Paste raw JSON, then Format/Validate to detect syntax issues.
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Slug Generator
Generate clean, SEO-friendly slugs.
How to use Paste a title and generate a URL-safe slug.
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UTM Builder
Build UTM parameters for campaigns.
How to use Fill campaign, source, medium fields and build a UTM-tagged URL.
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Markdown Converter
Convert Markdown to/from HTML.
How to use Paste Markdown and convert to HTML or vice versa.
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UUID Tools
Generate and analyze UUIDs.
How to use Choose a UUID version to generate or paste one to inspect.
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Regex Tester
Test and debug regex patterns.
How to use Enter pattern and sample text to test matches in real time.
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Hash Generator
Compute MD5/SHA hashes.
How to use Paste text or upload a file and select algorithm (MD5/SHA) to hash.
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JWT Decoder
Decode and inspect JSON Web Tokens.
How to use Paste JWT to view decoded header, payload, and signature.
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Epoch Converter
Convert Unix epoch time to human-readable.
How to use Enter an epoch or a date and convert between formats.
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UUID Generator
Generate UUIDs (v1/v4 etc.).
How to use Select UUID version and generate to copy for use.
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Password Strength Checker
Estimate password strength with tips.
How to use Type a password to see its score and improvement tips.
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Meta / Open Graph Preview
Preview OG/Twitter metadata rendering.
How to use Enter title, description, image URL and preview social card rendering.
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Base64 ⇄ Image Converter
Convert Base64 strings to images and back.
How to use Paste a Base64 string to decode to an image or upload an image to encode.
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Online PHP Array Generator
Array Generator Online.
How to use Enter values or JSON, choose target language (PHP/JS/C#/Go), preview array code.
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CSV ↔ JSON ↔ TOON Converter
CSV parser, JSON formatter, NDJSON, TSV/pipe-delimited.
How to use Paste or upload CSV/JSON and choose output format (NDJSON, TSV, etc.).
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PDF Converter Online Free
Convert PDF files to Word, Excel, PowerPoint, and JPG online.
How to use Upload a PDF, pick an output format (Word/Excel/PPT/JPG), then download.
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Short URL Online Free
100% free URL shortener. Fast, simple, secure.
How to use Paste a long URL, shorten it, and copy the short link to share.
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FAQ

Are all tools free?
Yes, all tools are 100% free and require no signup.
What languages are supported?
Supports Thai and English. Switch language at the top right.
Is my data safe?
Safe — no permanent data storage.