LaiUse — 178 Free Browser-Based Tools
Image compressor, PDF merger, JSON formatter, QR generator, password creator, AI writer, CPF calculator, HDB affordability, income tax estimator, and 169 more — all free, no signup, no downloads.
Browse All 178 ToolsWhy LaiUse?
100% Free
174 of 178 tools are completely free with no signup. 4 Pro tools (Image Resizer, Favicon Generator, Speed Test, Port Scanner) cost $5/month.
Privacy First
Most tools run entirely in your browser. Your images, files, and text never leave your device. Server-side tools auto-delete uploads in 1 hour.
Instant Results
No uploads, no waiting, no server delays. Process in seconds. Works offline once loaded — perfect for slow connections.
Works Everywhere
All modern browsers, all devices — desktop, tablet, mobile. No app to install. Just visit laiuse.com and start.
All 178 Tools — 12 Categories
Developer Tools (76)
JSON formatter, Base64/32/58 encoder, hash generator (MD5, SHA-256), UUID generator, regex tester, cron expression parser, JWT decoder, code beautifiers, and more.
View 76 Developer Tools →Network Tools (14)
DNS lookup, WHOIS, SSL certificate checker, IP lookup, ASN lookup, PTR lookup, port scanner, IPv4/IPv6 calculator, speed test, HTTP headers analyzer.
View 14 Network Tools →SEO Tools (14)
Title tag checker, meta description generator, H1 tag checker, canonical tag checker, noindex checker, sitemap generator, Google Ads headline and description generator.
View 14 SEO Tools →Utility Tools (16)
Password generator, unit converter, slug generator, countdown timer, ZIP/unzip, lorem ipsum, color picker, timestamp converter, case converter, and more.
View 16 Utility Tools →Media Tools (9)
Image compressor, resizer, format converter, splitter, watermark, background remover, video compressor, favicon generator, media converter.
View 9 Media Tools →AI Tools (17)
AI text summarizer, AI writing assistant, AI document Q&A, AI text-to-speech, AI music generator — all free with login, daily limits apply.
View 17 AI Tools →PDF Tools (5)
PDF editor (rotate, highlight, add text), PDF merger, PDF splitter, PDF compressor, image-to-PDF converter — all local in your browser.
View 5 PDF Tools →QR & Links (3)
QR code generator (URL, text, WiFi, vCard), advanced QR generator with logo support, URL shortener — all processing done locally.
View 3 QR Tools →Privacy Tools (2)
IP leak test (WebRTC/DNS/VPN detection), privacy leak test. Check if your real IP is exposed or if browser fingerprinting is leaking data.
View 2 Privacy Tools →Security Tools (2)
Password strength tester, hash generator (MD5, SHA-1, SHA-256, SHA-512). Verify your passwords and file integrity checksums.
View 2 Security Tools →Singapore Tools (12)
Singapore salary calculator, CPF contribution & retirement & housing calculators, HDB affordability & BTO/resale, income tax, private property, grade converter (PTE).
View 12 SG Tools →Math Tools (3)
Matrix transpose, matrix determinant, matrix inverse — all running locally with arbitrary precision for students, engineers, and data analysts.
View 3 Math Tools →Popular Tools This Week
Create QR codes for URLs, text, WiFi, vCards
Image CompressorReduce JPG/PNG/WebP size without losing quality
PDF MergerCombine multiple PDFs into one, drag to reorder
JSON FormatterFormat, validate, and minify JSON data
Password GeneratorGenerate strong random passwords with custom rules
URL ShortenerCreate short, shareable links from long URLs
Singapore Salary CalculatorCompute take-home pay with CPF, income tax
HDB Affordability CalculatorCheck HDB loan eligibility & TDSR/MSR limits
About LaiUse
LaiUse is a free online productivity platform with 178 browser-based tools organized into 12 categories: Developer, Network, SEO, Utility, Media, AI, PDF, QR & Links, Privacy, Security, Singapore, and Math Tools.
Unlike traditional SaaS tools that require signup and upload your data to remote servers, LaiUse processes most operations entirely in your web browser. Image compression, JSON formatting, password generation, PDF merging — these run on your device, meaning your data never leaves your computer. The few tools that need server processing (Image Resizer, Favicon Generator, Speed Test, Port Scanner) are Pro-tier at $5/month.
Singapore users get dedicated calculators: Salary (with CPF and IRAS tax), CPF contribution / retirement / housing withdrawal, HDB affordability and BTO vs Resale comparison, income tax estimator, private property affordability, and a PTE/O-Level/A-Level grade converter. These are calibrated against official IRAS, CPF Board, MAS, and HDB Aug 2026 schedules and verified against moneysmart.sg, 99.co, PropertyGuru, and HDB's official PDFs.
LaiUse is also an embeddable platform. Any of 60+ tools can be embedded into third-party websites via iframe with a single click — useful for bloggers, documentation sites, and forums that want a free calculator without building their own.
Contact & Support
Need help with a tool? Found a bug? Have a feature request?
Email us at support@laiuse.com — typical response within 24-48 hours.
Or visit our Support page · About · Contact form