Tools starting with U

Udyam Registration Category Calculator

Classify a business as micro, small or medium under the MSMED Act composite investment and turnover test for Udyam registration.

UFW Rule Generator

Generate valid ufw allow, deny, reject and limit rules for ports, ranges, source networks and app profiles, plus a safe enable order.

UGC Brief Generator

Generate a UGC creator brief with a timed shot list, per-scene word budgets, delivery specs and clear dos and don'ts.

UI Spacing Consistency Checker

Audit Tailwind spacing classes and pixel values against a consistent 4px design-system rhythm.

ULID Generator

Generate sortable, unique ULIDs as an alternative to UUIDs.

Ultimate Wheel Spin Tool

Spin a customizable wheel to generate random choices easily.

Ultrasound vs LMP Due Date Comparator

Compare the due date from your last period with the scan-dated one and see whether the gap crosses the ACOG redating threshold.

Umask Calculator

See the exact file and directory permissions any umask value produces, with symbolic form, a reverse calculator and safety warnings.

Uncertainty Propagation Workbench

Derive combined and expanded measurement uncertainty from each input's value, uncertainty, and exponent, with a Monte Carlo cross-check for validation.

Unclaimed Deposit Search Checklist

Classify a dormant account, share folio, policy or EPF balance against the DEAF, IEPF and SCWF rules and get the exact claim checklist.

UNESCO Heritage Site Explorer

Explore UNESCO World Heritage sites by country, UNESCO region, cultural or natural category and year of inscription.

Unicode / ASCII Converter

Convert text into Unicode escapes or ASCII codes and back.

Unicode Escape Tool

Escape text to \uXXXX sequences or unescape them back to characters.

Unicode Symbol Generator

Browse and copy from a large categorized library of Unicode symbols including arrows, stars, hearts, math, currency, music, and more.

Unit Circle Explorer

Move around the unit circle to see the coordinates, quadrant, reference angle and all six trig ratios for any angle.

Unit Converter

Convert 71 units across length, weight, temperature, area, volume, speed, data and time.

Unit Price Comparison Calculator

Compare price per unit across different pack sizes and brands to find which option is genuinely cheaper.

Unit Test Weightage Calculator

Combine unit test scores with their weightings into one final subject score using the weighted mean of percentages.

Universal PII & AI Input Redactor

Detect and redact personal data, financial identifiers, and secrets locally before sharing text with AI or another person.

Unix Timestamp Converter

Convert Unix timestamps to readable local, UTC, and ISO dates.

Unlock PDF

Remove the open password from a PDF you own and download an unlocked copy, entirely in your browser.

Unzip Files Online

Open ZIP files in your browser: browse folders, preview text and images, download single files, re-zip a selection or create a new ZIP.

UPI AutoPay Mandate Calendar

Plan estimated recurring mandate dates locally, add pause or revoke review reminders, and export a non-authoritative ICS calendar.

UPI Collect Request Decoder

Decode pasted UPI payment and collect-request payloads locally to inspect the payee, amount, reference fields, and debit warnings without opening a payment app.

UPI QR Code Generator

Create a UPI payment QR code from a VPA, payee name and optional fixed amount, note and reference.

UPI Transaction Limit Checker

Find the binding UPI limit for a payment — NPCI category cap, your bank's cap and what is left of today's quota.

Upload Consistency Score

Score publishing consistency from your upload dates using gap adherence, coefficient of variation and pace, and list every silence.

Upscale Image

Enlarge an image in your browser using Lanczos, bicubic, bilinear or nearest-neighbour resampling with optional sharpening.

Upside Down Text

Flip your text upside down and backwards using mathematical Unicode character mappings for creative styling.

Urdu Muhavare Explorer

Explore Urdu idioms in Nastaliq with Roman transliteration, literal sense, meaning, usage sentences and a meaning quiz.

Urea and BUN Converter

Convert between blood urea nitrogen and urea in mg/dL and mmol/L, with the BUN to creatinine ratio and reference intervals.

URL Encoder Decoder Tool

Encode and decode URLs instantly for safe web usage.

URL Parser

Break a URL into its protocol, host, path, query and hash parts.

URL Redirect Checker

Check where a URL redirects — every hop, status code, response time, and headers.

URL Slug Collision Checker

Normalise a list of titles into URL slugs, find the ones that collide after folding and truncation, and assign WordPress-style numeric suffixes.

URL Tracking Parameter Stripper

Remove utm, gclid, fbclid, mc_eid and hundreds of other tracking parameters from links, in bulk, entirely in your browser.

US GPA To Percentage Converter

Convert a US 4.0-scale GPA back into an approximate percentage and letter grade using the standard US grading bands.

USB Drive Hygiene Checklist

Score the residual risk of a USB situation against the controls you actually have in place, and see which ones only feel safe.

Used Bike Buying Checklist

Inspect a used motorcycle with a structured points checklist that scores condition and turns failures into an offer.

User Agent Parser

Break a User-Agent string into browser, engine, operating system, device type and CPU architecture.

User Info Finder

Find user information quickly using smart search and filtering.

Username Generator

Generate unique, creative usernames instantly for any platform.

UTC Offset Team Matrix

Build a 24-hour overlap grid for a distributed team — local clocks per city, shared working hours and the best meeting slots.

Utility Tariff CSV Comparator

Compare the same electricity usage profile across multiple tariff plans.

Utility Transfer Checklist

Date every electricity, water, gas, broadband and DTH action for a move, using the statutory new-connection timelines.

UTM Builder

Free UTM builder for campaign URLs — set utm_source, utm_medium and utm_campaign, then copy a clean tracking link.

UUID Generator

Generate secure unique UUIDs instantly for any application.

UV Safety Window

Find the comparatively lower-UV windows for going outdoors from the forecast.