# Useful Utilities

> Free, client-side, offline-first browser utilities for developer, image, PDF, audio/video, network, and data processing.

Almost all tools process data entirely within the user's browser using JavaScript and WebAssembly, so files and inputs are not uploaded to a server. We do not store the data users put into our tools. No signup, registration, or login is required, and once loaded these tools work offline (PWA support).

Exceptions, stated plainly: a few tools must reach the network to do their job at all — the Package Latest Version Checker (queries public package registries), the Currency Converter (fetches live exchange rates), the Network Utilities (measure a real connection), the IFSC Code Lookup (queries a public bank-branch directory), and the Webhook Tester (receives real HTTP requests). Separately, creating an MCP API key stores the requesting IP address and an approximate region for abuse prevention. Full detail: https://www.usefulutils.in/privacy-policy/

## Developer Utilities

### Cron Expression Generator
URL: https://www.usefulutils.in/developer-utils/cron-generator/
Visual cron builder and crontab calculator with presets for Unix, Kubernetes, EventBridge, NiFi.
Keywords: cron, crontab, cron expression, crontab calculator, cron online, cron generator, eventbridge, nifi, schedule, job, expression

### CSS Border Radius Generator
URL: https://www.usefulutils.in/developer-utils/css-border-radius/
Visual tool to tweak border-radius for all corners individually.
Keywords: css, border, radius, rounded, corners, generator

### CSS Box Shadow Generator
URL: https://www.usefulutils.in/developer-utils/css-box-shadow/
Design beautiful smooth box shadows with visual controls for blur, spread, and color.
Keywords: css, shadow, box-shadow, box shadow generator, css box shadow maker, smooth box shadow, generator, design, ui

### CSS Gradient Generator
URL: https://www.usefulutils.in/developer-utils/css-gradient/
Create linear and radial CSS gradients with custom angles and colors.
Keywords: css, gradient, css gradient generator, css generator gradient, linear, radial, color, background, generator

### Package Latest Version Checker
URL: https://www.usefulutils.in/developer-utils/package-version-checker/
Look up the latest npm, PyPI, crates.io, RubyGems, or Packagist version from the live registry.
Keywords: package version, latest version, npm latest version, pypi latest version, check package version, dependency, outdated, crates, rubygems, packagist, composer, version checker

### Regex Tester & Debugger
URL: https://www.usefulutils.in/developer-utils/regex-tester/
Test regular expressions live with match highlighting, capture groups, and real error messages.
Keywords: regex, regexp, regex tester, regular expression, regular expression tester, regex debugger, test regex online, pattern, match, capture group, named group, javascript regex

### SQL Formatter
URL: https://www.usefulutils.in/developer-utils/sql-formatter/
Beautify messy SQL queries instantly. Private client-side processing.
Keywords: sql, formatter, beautify, clean, indent, query, database

### Webhook Tester & Inspector
URL: https://www.usefulutils.in/developer-utils/webhook-tester/
Inspect HTTP requests and visualize JSON payloads.
Keywords: webhook, tester, request, inspector, api, http, post, debug, client

## JSON Utilities

### CSV ↔ JSON Converter
URL: https://www.usefulutils.in/json-utils/csv-converter/
Convert between CSV and JSON formats instantly.
Keywords: json, csv, excel, convert, transform, table, spreadsheet

### JSON ↔ YAML Converter
URL: https://www.usefulutils.in/json-utils/yaml-converter/
Convert between JSON and YAML formats instantly.
Keywords: json, yaml, yml, convert, transform

### JSON Schema Generator
URL: https://www.usefulutils.in/json-utils/json-schema-generator/
Generate JSON Schema Draft-07 from any JSON object.
Keywords: json, schema, generate, draft-07, structure, types

### JSON to Strict Type
URL: https://www.usefulutils.in/json-utils/json-to-type/
Convert JSON to TypeScript, Zod, Rust, and Go types instantly.
Keywords: json, typescript, ts, type, interface, struct, rust, go, zod

### JSON/XML Formatter
URL: https://www.usefulutils.in/json-utils/json-formatter/
Pretty‑print, validate, minify, and sort JSON and XML.
Keywords: json, xml, formatter, pretty, beautify, lint, validate, minify

### JWT Debugger
URL: https://www.usefulutils.in/json-utils/jwt-debugger/
Decode and inspect JSON Web Tokens (JWT) client-side.
Keywords: jwt, token, decode, debug, json web token, auth

## Text Utilities

### Base64 Encode/Decode
URL: https://www.usefulutils.in/text-utils/base64/
Encode or decode Base64 — works offline for small files too.
Keywords: base64, base64 converter, base64 decoder offline, encode, decode, string, binary, offline

### HTML Entity Encoder
URL: https://www.usefulutils.in/text-utils/html-entity-encoder/
Convert special characters to HTML entities and back.
Keywords: html, entity, encode, decode, escape, unescape, special chars

### Real-Time Word Counter
URL: https://www.usefulutils.in/text-utils/word-counter/
Instantly count words, characters, lines, and paragraphs.
Keywords: word, count, counter, character, line, paragraph, length

### Text Case Converter
URL: https://www.usefulutils.in/text-utils/case-converter/
Convert text to UPPERCASE, lowercase, Title Case, or Sentence case.
Keywords: case, converter, upper, lower, caps, capital, title

### Text Diff
URL: https://www.usefulutils.in/text-utils/text-diff/
Compare two pieces of text and highlight differences.
Keywords: diff, difference, compare, text, code

### Unicode Normalizer
URL: https://www.usefulutils.in/text-utils/unicode-normalizer/
NFC/NFD normalization and invisible character cleaner.
Keywords: unicode, normalize, nfc, nfd, invisible, clean, text

### URL Encoder/Decoder
URL: https://www.usefulutils.in/text-utils/url-encoder/
Encode text to URL-safe format and decode standard URLs strings.
Keywords: url, encoder, decoder, percent, escape, uri

## Image Utilities

### Format Converter
URL: https://www.usefulutils.in/image-utils/image-converter/
Convert between PNG, JPG, and WebP directly in your browser.
Keywords: image, convert, format, png, jpg, webp, transform

### Image Compressor
URL: https://www.usefulutils.in/image-utils/image-compressor/
Adjust quality to shrink file size without noticeable loss.
Keywords: image, compress, shrink, optimize, minify, size

### Image Resizer
URL: https://www.usefulutils.in/image-utils/image-resizer/
Change width/height, keep aspect ratio, and export as JPG/PNG/WebP.
Keywords: image, resize, scale, dimension, width, height, photo

### Screenshot Redactor
URL: https://www.usefulutils.in/image-utils/screenshot-redactor/
Blur, pixelate, or black out sensitive info in screenshots. 100% client-side privacy.
Keywords: image, redact, blur, pixelate, hide, privacy, censor

### Smart Crop
URL: https://www.usefulutils.in/image-utils/smart-crop/
Crop to common aspect ratios (1:1, 16:9, 4:3) with drag & preview.
Keywords: image, crop, trim, aspect ratio, cut, thumbnail

## PDF Utilities

### Image to PDF
URL: https://www.usefulutils.in/pdf-utils/image-to-pdf/
Convert JPG, PNG, and WebP images into a single PDF document.
Keywords: pdf, image, convert, jpeg, png, create

### Merge PDF
URL: https://www.usefulutils.in/pdf-utils/merge-pdf/
Combine multiple PDF files into one. Reorder pages and save.
Keywords: pdf, merge, combine, join, stitch

### Split PDF
URL: https://www.usefulutils.in/pdf-utils/split-pdf/
Extract specific pages or ranges (e.g. 1-5, 10) from a PDF file.
Keywords: pdf, split, extract, pages, separate, cut

## Time Utilities

### Simple Timer
URL: https://www.usefulutils.in/time-utils/countdown-timer/
Enter a positive integer (seconds) and watch it countdown second by second.
Keywords: timer, countdown, stopwatch, alarm, watch

### Time Difference Calculator
URL: https://www.usefulutils.in/time-utils/time-difference/
Calculate precise duration between two datetimes — days, hours, minutes, seconds.
Keywords: time difference, calculate time difference, datetime difference, difference hours, hours between dates, days between dates, duration, elapsed, interval

### Timezone Converter
URL: https://www.usefulutils.in/time-utils/timezone-converter/
Compare times across cities, with daylight-saving awareness.
Keywords: timezone, time zone, world clock, utc, gmt, est, pst, convert

### Unix Timestamp Converter
URL: https://www.usefulutils.in/time-utils/unix-timestamp/
Convert epoch seconds/milliseconds to human-readable time and back.
Keywords: unix, timestamp, epoch, seconds, milliseconds, converter, epoch to human, to epoch, unix time

## Network Utilities

### DNS Resolution Time Check
URL: https://www.usefulutils.in/network-utils/dns-check/
Extracts the exact time taken to resolve domain name into IP address using Performance Timing API.
Keywords: dns, domain, lookup, resolution, ip, time

### Network Latency Test
URL: https://www.usefulutils.in/network-utils/latency-test/
Test network latency from your browser — measure RTT, check latency, diagnose connection issues.
Keywords: latency, latency test, network latency test, latency tester, latency checker, browser latency test, client side latency, ping, rtt, lag, speed, network

### Path Quality Indicator
URL: https://www.usefulutils.in/network-utils/path-quality/
Compares RTT to multiple edge server locations to identify network bottlenecks.
Keywords: path, quality, network, route, connection, stability

## Security Utilities

### Email Header Analyzer
URL: https://www.usefulutils.in/security-utils/email-header-analyzer/
Analyze email headers for SPF, DKIM, DMARC, and routing delays.
Keywords: email, header, headers, spf, dkim, dmarc, trace, routing, spam

### Hash Generator
URL: https://www.usefulutils.in/security-utils/hash-generator/
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text and data verification.
Keywords: hash, md5, sha, sha1, sha256, crypto, digest, checksum

### Homoglyph Detector & Generator
URL: https://www.usefulutils.in/security-utils/homoglyph-detector/
Detect and generate Unicode homoglyphs, IDN attacks, and invisible characters.
Keywords: homoglyph, homoglyph detector, homoglyph generator, homoglyph checker, homograph, phishing, spoof, fake, idn, unicode, punycode

### Password, Passphrase & PIN Generator
URL: https://www.usefulutils.in/security-utils/password-passphrase-generator/
Generate secure passwords, memorable passphrases, or numeric PINs with leet speak, entropy meter, and advanced modifiers.
Keywords: password, passphrase, pin, generator, secure, random, strong, credentials, leet, entropy, diceware, pin code

### Safe Filename
URL: https://www.usefulutils.in/security-utils/safe-filename/
Strip banned characters and normalize filenames.
Keywords: filename, sanitize, sanitization, slug, clean, rename, windows, linux, filename sanitization

## Table Utilities

### Merge & Split Columns
URL: https://www.usefulutils.in/table-utils/merge-split-columns/
Combine multiple columns into one field or split values into separate fields.
Keywords: merge columns, split column, combine fields, csv restructure

### Pivot Table Creator
URL: https://www.usefulutils.in/table-utils/pivot-table/
Create interactive pivot tables and summaries from CSV data.
Keywords: pivot table, csv, tsv, aggregate, crosstab, summarize

### Text to Columns Converter
URL: https://www.usefulutils.in/table-utils/text-to-columns/
Parse unstructured line lists into structured tabular columns.
Keywords: text to columns, data to columns, parse log to csv, split by delimiter

## List Utilities

### Clean List
URL: https://www.usefulutils.in/list-utils/clean-list/
Remove empty lines and trim whitespace.
Keywords: list, clean, trim, empty, whitespace

### Filter List
URL: https://www.usefulutils.in/list-utils/filter-list/
Search and filter list items by text match.
Keywords: list, filter, search, find, query

### Item Frequency
URL: https://www.usefulutils.in/list-utils/list-frequency/
Count how often each item appears in a list.
Keywords: list, frequency, count, occurrences, stats

### List Difference
URL: https://www.usefulutils.in/list-utils/list-difference/
Find items in List A that are not in List B.
Keywords: list, difference, diff, compare, subtract

### List Intersection
URL: https://www.usefulutils.in/list-utils/list-intersection/
Find common items present in both lists.
Keywords: list, intersection, common, shared, overlap

### List Statistics
URL: https://www.usefulutils.in/list-utils/list-statistics/
Calculate Sum, Average, Min, and Max for numeric lists.
Keywords: list, statistics, stats, sum, average, min, max

### List Union (Merge)
URL: https://www.usefulutils.in/list-utils/list-union/
Combine two lists into one, with optional deduplication.
Keywords: list, union, merge, combine, all

### Remove Duplicates
URL: https://www.usefulutils.in/list-utils/remove-duplicates/
Instantly remove duplicate lines or items.
Keywords: list, duplicates, dedup, unique, clean, lines

### Reverse List
URL: https://www.usefulutils.in/list-utils/reverse-list/
Flip the order of items in the list.
Keywords: list, reverse, flip, invert, order

### Sort List
URL: https://www.usefulutils.in/list-utils/sort-list/
Sort text or numbers alphabetically or numerically.
Keywords: list, sort, order, alphabetical, numerical, az

### Split / Chunk List
URL: https://www.usefulutils.in/list-utils/chunk-list/
Divide a large list into smaller groups or chunks.
Keywords: list, chunk, chunk list, split, divide, group, batch, list util

## Video & Audio Utilities

### Audio Sync & Replace
URL: https://www.usefulutils.in/video-utils/audio-sync-replace/
Auto-align clean audio with video and replace the noisy track using cross-correlation.
Keywords: audio, sync, align, replace, video, cross-correlation, ffmpeg, clean, noisy

### MP3 Trimmer & Ringtone Cutter
URL: https://www.usefulutils.in/video-utils/mp3-trimmer/
Trim MP3 and audio tracks effortlessly. Cut ringtones without re-encoding.
Keywords: mp3 trimmer online, audio cutter online, ringtone maker, crop audio file, split mp3 online, cut audio track, sound editor and trimmer, audio slicer, shorten audio clip, podcast segment extractor

### Video Compressor
URL: https://www.usefulutils.in/video-utils/video-compressor/
Reduce video file sizes flawlessly. Optimize MP4s for Discord or email size limits.
Keywords: video compressor online, reduce video file size, mp4 file shrinker, video optimizer for discord, compress video for email, video size reducer, downsize video file, resize video resolution, video quality reducer, lossless video compressor

### Video Cutter & Trimmer
URL: https://www.usefulutils.in/video-utils/video-cutter/
Free online video cutter and trimmer. Cut MP4, WebM, and MOV files losslessly without re-encoding.
Keywords: video cutter, trim video online, cut mp4 file free, video splitter, shorten video length, video slicer, crop video duration, video segment extractor, cut video for reels, lossless video trimmer

### Video Muter & Audio Remover
URL: https://www.usefulutils.in/video-utils/video-muter/
Strip the audio track from videos instantly to create silent clips.
Keywords: video muter, remove audio from video, mute video online, strip sound from mp4, delete audio track, video silencer, remove background audio, soundless video maker, mute video for reels, remove voice from video

### Video to GIF Maker
URL: https://www.usefulutils.in/video-utils/video-to-gif/
Convert short video clips into perfectly looping, optimized animated GIFs.
Keywords: video to gif maker, mp4 to gif converter, create gif from video, gif generator online, video to animated image, meme gif creator, video clip to gif, high quality video to gif, webm to gif converter, convert video to looping gif

### Video to MP3 Converter
URL: https://www.usefulutils.in/video-utils/video-to-mp3/
Extract MP3 audio seamlessly from any video file without losing quality.
Keywords: video to mp3 converter, mp4 to audio extractor, extract sound from video, video sound ripper, mp4 to mp3 online free, video to audio converter, podcast audio extractor, extract mp3 from mp4, audio track separator, video to voice converter

## Wealth & Debt Utilities

### Compound Interest Calculator
URL: https://www.usefulutils.in/wealth-debt-utils/compound-interest/
Visualize your wealth growth over time with flexible contributions.
Keywords: compound interest calculator, investment calculator, APY calculator, future value

### Debt & Credit Payoff
URL: https://www.usefulutils.in/wealth-debt-utils/debt-payoff/
Plan your journey to becoming debt-free using different payoff strategies.
Keywords: debt payoff calculator, credit card payoff, minimum payment calculator

### Live Currency Converter
URL: https://www.usefulutils.in/wealth-debt-utils/currency-converter/
Free online currency converter. Convert global currencies with live exchange rates.
Keywords: currency converter, exchange rate, foreign exchange, money converter, fx

### ROI Calculator
URL: https://www.usefulutils.in/wealth-debt-utils/roi-calculator/
Calculate percentage return and net profit for any investment.
Keywords: roi calculator, return on investment calculator, net profit calculator

### Super Loan Calculator
URL: https://www.usefulutils.in/wealth-debt-utils/loan-calculator/
Calculate monthly payments and total interest for personal, auto, and home loans.
Keywords: loan calculator, auto loan calculator, mortgage calculator, monthly payment

## AI Utilities

### OCR - Text Extractor
URL: https://www.usefulutils.in/ai-utils/ocr/
Extract text from images using server-side Tesseract OCR. Requires a network connection.
Keywords: ocr, optical character recognition, text from image, scan, extract

### Speech Transcription
URL: https://www.usefulutils.in/ai-utils/transcription/
Convert speech to text in real-time using Web Speech API. Works completely offline.
Keywords: transcribe, transcription, speech to text, voice, dictation, stt

## India Utilities

### GSTIN Validator
URL: https://www.usefulutils.in/india-utils/gstin-validator/
Verify a GST number against its official check digit, and decode state, PAN and holder type.
Keywords: gstin, gst, gst number, gstin validator, gst number check, validate gstin, gst checksum, gst state code, india, tax

### IFSC Code Lookup
URL: https://www.usefulutils.in/india-utils/ifsc-code-lookup/
Validate an IFSC code and find the bank, branch, address, city and MICR code.
Keywords: ifsc, ifsc code, ifsc lookup, bank branch, micr, neft, rtgs, imps, bank code, india

### PAN Card Format Validator
URL: https://www.usefulutils.in/india-utils/pan-validator/
Check PAN structure and decode the holder type — individual, company, HUF, trust or firm.
Keywords: pan, pan card, pan validator, pan format, validate pan, pan holder type, income tax, india

## API & Integrations

### Model Context Protocol (MCP) Server
URL: https://www.usefulutils.in/mcp/
Connect your AI agents to our tools via the MCP Server.
Keywords: mcp, model context protocol, ai, agent, claude, cursor, api, serverless