Tools Directory
Discover all free, private, and browser-powered utilities on Zevylo. Find exactly what you need in seconds.
Word Counter
Count words, characters, sentences, and more.
JSON Formatter
Format, minify, and validate JSON data.
Meta Tag Generator
Generate HTML meta tags for SEO optimization.
Password Generator
Generate secure, random passwords.
Password Strength Checker
Test the strength and security of your passwords.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number.
Unit Converter
Comprehensive unit converter for length, weight, temperature, and more.
Image Compressor & WebP Converter
Compress PNG, JPEG, and WebP images client-side without quality loss.
PDF Merge & Combine Tool
Merge multiple PDF documents client-side without uploading to any remote server.
Tap BPM Tempo Counter
Calculate beats per minute (BPM) by tapping any key or clicking in rhythm.
3D STL File Viewer & Inspector
Preview, rotate, and inspect 3D STL CAD models in browser without any plugins.
Color Converter & Shades Generator
Convert between HEX, RGB, HSL, HSV, and CMYK with WCAG contrast and tint/shade scales.
Video to Frames & JPG Extractor
Extract high-resolution JPG, PNG, and WebP image frames from MP4, WebM, and MOV videos online.
AI Prompt Crafter & Midjourney Styler
Engineer photorealistic prompts for Midjourney v6, DALL-E 3, Stable Diffusion, Flux, and ChatGPT.
Free Resume & CV Builder (Print to PDF & Word DOC)
Build professional ATS-friendly resumes and CVs with instant Letter/A4 live preview and PDF/DOC export.
Online Alarm Clock, Stopwatch & Countdown Timer
Free browser alarm clock with custom chimes, countdown focus timer, and precision split stopwatch.
Case Converter
Convert text between different letter cases.
Base64 Encoder/Decoder
Encode and decode Base64 strings.
SERP Preview
Preview how your page looks in Google Search results.
QR Code Generator
Generate custom QR codes for URLs and text.
ROI Calculator
Calculate Return on Investment, net profit, and annualized ROI.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Canvas Sketch & Signature Pad
Freehand sketching canvas and digital signature pad with transparent PNG export.
PDF Page Rotator
Permanently rotate PDF document pages by 90, 180, or 270 degrees client-side.
Online Metronome
Accurate, jitter-free interactive metronome with visual pendulum and time signatures.
Agile Sprint Retrospective Board
Collaborate and organize agile sprint retrospectives with voting, categories, and report exports.
Image Color Palette Extractor
Extract dominant color palettes and hex codes from any photo or graphic.
Video to JPG Converter
Convert MP4, WebM, and MOV video clips into high-quality JPEG photos with custom frame rates and ZIP download.
Video Compressor (Client-Side Size Reducer)
Compress MP4 and WebM videos directly in your browser without uploading to any server.
AI Text Humanizer & Bypass Rewriter
Transform robotic, repetitive AI text into natural, bypass-ready human prose.
AI Article & Blog Outline Generator
Generate comprehensive blog post outlines, high-CTR headlines, and structured draft frameworks.
YouTube Title, Tag & SEO Generator
Generate high-CTR video titles, ranking YouTube tags, viral hashtags, and SEO descriptions.
Project Price Estimator & Quote Proposal Generator
Calculate project costs, freelance rates, profit margins, and generate tiered client price quotes.
Academic Assignment & Essay Outline Planner
Plan structured essays, academic research papers, thesis statements, and word count allocations.
Birthday & Anniversary Countdown Calculator
Calculate exact age, countdown to next birthday, total seconds/days lived, and milestone anniversaries.
Text Diff Checker
Compare two text snippets to find differences.
JWT Decoder
Decode JSON Web Tokens and view claims.
Open Graph Generator
Generate Open Graph and Twitter Card tags.
UUID Generator
Generate universally unique identifiers (UUIDs).
Profit Margin Calculator
Calculate gross margin, markup, and profit amount.
Data Size Converter
Convert between bytes, KB, MB, GB, TB, and more.
PDF to Text Extractor
Extract plain text, words, and content from PDF documents directly in browser.
Online Tone Generator & Oscilloscope
Generate pure frequency sine, square, sawtooth, and triangle audio tones from 20Hz to 20kHz.
Coin Flip Simulator (3D Heads or Tails)
Realistic 3D animated coin flipper with streak tracking, fair cryptographic RNG, and multi-coin batch mode.
Color Palette Generator (Harmonies & Schemes)
Generate harmonious 5-color aesthetic palettes with spacebar randomizer, lock swatches, and CSS/JSON export.
Video to PNG Converter (Lossless Frame Extractor)
Extract uncompressed, lossless PNG pictures and frames from MP4, WebM, and MOV videos with zero quality loss.
Video Trimmer & Cutter (No Upload)
Cut and trim video clips online directly in your browser with interactive start/end scrubbers.
AI Content & Perplexity Detector
Analyze text for AI likelihood using statistical perplexity and burstiness metrics.
GEO & AEO Optimizer (AI Search Visibility)
Audit and optimize articles and content for ChatGPT Search, Perplexity AI, Claude, and Google AI Overviews.
Social Video Link Inspector & Downloader Guide
Inspect video links from YouTube, TikTok, Instagram, and Facebook with HD thumbnail downloader and lossless download commands.
Realistic Handwriting & Notes Generator
Convert typed digital text into realistic handwritten notes on lined paper with custom ink and font styles.
Countdown Timer
Live countdown to any date and time — days, hours, minutes, and seconds.
Regex Tester
Test and debug regular expressions.
Robots.txt Generator
Generate robots.txt files for search engine crawlers.
UTM Link Builder
Generate trackable URLs with UTM parameters.
Loan EMI Calculator
Calculate monthly loan EMI payments, total interest, and annual amortization schedule.
PDF Watermark Applier
Add custom security text watermarks or stamps to PDF documents in your browser.
Virtual Piano Keyboard & Chord Finder
Play piano keys online, discover chords, and learn musical scales with polyphonic audio.
Free Invoice Generator (Print & PDF)
Professional client-side invoice maker with customizable line items, tax rates, and 1-click Print/PDF export.
Color Contrast Checker
Check text/background color contrast against WCAG AA and AAA accessibility standards.
Video Quality & Metadata Checker
Inspect video resolution, aspect ratio, estimated bitrate, and social media platform readiness.
AI Code Explainer & Multi-Language Converter
Explain logic, audit syntax vulnerabilities, estimate Big O complexity, and convert code between languages.
YouTube Video Summarizer & Note Taker
Summarize YouTube video transcripts and notes into structured key takeaways and action items.
Bulk Personalized Email Outreach Generator
Generate personalized bulk email templates with variables, merge tags, and TXT/CSV batch exports.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.
Keyword Density & N-Gram Analyzer
Analyze 1-word, 2-word, and 3-word keyword density with SEO stuffing alerts.
Barcode Generator (Code 128)
Free online Code 128 barcode generator with instant PNG and SVG vector download.
Compound Interest Calculator
Calculate investment growth, future value, and compounding interest with monthly contributions.
PDF to Image Converter (PNG, JPG, WebP)
Convert PDF pages and embedded graphics into high-resolution PNG, JPG, or WebP images.
Text to Speech Reader (TTS Voice Synthesizer)
Free natural-sounding text to speech reader with multi-voice selection and speed/pitch modulation.
Digital Signature Pad (Draw & Download PNG)
Smooth online canvas to draw digital signatures with custom pen stroke width, colors, and transparent PNG download.
Color Palette Generator & Harmony Studio
Generate harmonic color schemes with HEX, RGB, HSL codes and contrast scores.
Video to Animated GIF Converter
Convert MP4, WebM, and MOV video clips into lightweight, looping animated GIFs.
AI Plain English to SQL & Regex Builder
Convert plain English requirements into production SQL queries and regular expression patterns.
Code to Image Generator
Generate beautiful syntax-highlighted code images for Twitter, blog posts, and slides.
XML Sitemap Generator & Validator
Build Google-compliant XML sitemaps with priorities, change frequencies, and lastmod tags.
Crop PDF Online (Ezgif PDF Cropper)
Crop PDF page margins, trim white space, or crop to custom bounding boxes online.
Free Voice to Text & Audio Speech Transcriber
Transcribe spoken voice and microphone dictation into clean text in real-time.
GIF to MP4 & WebM Video Converter
Convert animated GIFs into lightweight, hardware-accelerated MP4 and WebM videos.
Rotate & Flip Video Online
Rotate video 90°, 180°, 270° clockwise or counter-clockwise, and flip horizontally or vertically.
AI Viral Hook & Social Post Crafter
Generate high-CTR hooks, Twitter/X threads, LinkedIn thought-leadership, and TikTok intros.
JSON to TypeScript Converter
Convert JSON objects into strongly-typed TypeScript interfaces and types automatically.
SERP Title & Snippet Pixel Width Simulator
Calculate exact Google SERP pixel lengths to prevent title and description truncation.
Morse Code Translator & Audio Player
Translate text to Morse code and Morse to text with real-time sound audio playback.
Audio Trimmer & Cutter
Cut and trim MP3, WAV, and audio files with interactive waveform visualization.
Pomodoro Timer
Focus timer with work/break cycles, session tracking, and an alert chime.
Reverse Video Online (Rewind Video)
Play and save your video backwards in reverse motion online with custom speed options.
AI Story & Creative Narrative Generator
Generate original story outlines, multi-layered characters, plot twists, and opening chapters.
Stylish Text & Fancy Font Generator
Convert regular text into 18+ aesthetic Unicode fonts, cursive script, gothic fraktur, and cute bio styles.
Cron Expression Generator & Explainer
Build, validate, and understand crontab schedules with human-readable English translations.
Twitter / X Card Preview & Meta Generator
Preview and generate Twitter / X summary and summary_large_image card meta tags.
Currency Converter
Free real-time currency converter across 35+ global world currencies with live rate matrix.
Audio Speed & Tempo Changer
Speed up or slow down audio files from 0.25x to 3.0x with optional pitch preservation.
Video Speed Changer (Fast & Slow Motion)
Speed up or slow down videos from 0.25x to 4x playback rates with pure client-side processing.
AI Startup & Brand Name Generator
Generate brandable company names, domain ideas, catchy taglines, and value propositions.
Text Extractor (Emails, URLs, Phone Numbers, IPs)
Extract email addresses, web links, phone numbers, IP addresses, hashtags, and numbers from raw text.
URL Encoder / Decoder & Query Parser
Encode, decode URLs and query parameters with real-time parameter breakdown.
URL Cleaner & Tracking Stripper
Remove UTM tags, tracking parameters, fbclid, and click IDs from web links.
Time Zone Converter & Meeting Planner
Interactive world clock and 24-hour time scrubber to convert timezones and plan global meetings.
Mute Video & Extract Audio Online
Remove audio from videos to create silent clips, or extract the audio track directly.
Remove Duplicate Lines
Remove duplicate lines from a list, with case, trim, sort, and keep-first/last options.
Hreflang Tags & International SEO Generator
Generate valid multi-language and regional hreflang tags for global SEO.
HMAC Generator (SHA-256, SHA-384, SHA-512)
Generate keyed-hash message authentication codes (HMAC) using the browser Web Crypto API.
Sales Tax & VAT Calculator
Calculate sales tax, VAT, gross price, and net price with customizable tax rates.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
Free Online Screen Recorder (No Watermark)
Record your screen, browser tab, or app window with audio directly in your browser.
Find and Replace Text
Find and replace text online with case, whole-word, and regex options.
Social Media & SEO Hashtag Generator
Generate trending hashtags for Instagram, TikTok, LinkedIn, and YouTube by topic with limit counters.
Salary & Hourly Wage Calculator
Convert hourly wage to annual salary, monthly, bi-weekly, and take-home pay.
Crop Video Online (Ezgif Video Crop)
Crop video aspect ratios to 1:1, 16:9, 9:16 (TikTok / Reels), 4:3, or custom bounding box.
Sort Text Lines
Sort lines alphabetically, numerically, by length, reverse, or shuffle them.
GPA & Grade Point Calculator
Calculate semester and cumulative Grade Point Average (GPA) on standard 4.0 scale.
HTML to Markdown Converter
Convert HTML code into clean, well-formatted Markdown in real time.
Online MP4 Converter (Ezgif Video to MP4)
Convert WebM, MOV, MKV, AVI, and FLV video files into universally compatible MP4 video.
AI Presentation & Pitch Deck Outliner
Generate comprehensive multi-slide presentation decks with talking points and speaker notes.
Whitespace & Line Cleaner
Remove extra spaces, blank lines, tabs, and line breaks from messy text.
Fuel Cost & Trip Mileage Calculator
Calculate total gas cost, fuel volume needed, and passenger cost splits for road trips.
MP4 to MP3 Audio Converter (Ezgif Video to Audio)
Extract high-fidelity audio tracks from MP4, WebM, and MOV video clips into MP3 / WAV audio.
AI Email Subject Line & Open Rate Scorer
Generate high-CTR email subject lines with spam trigger audits and open-rate scores.
Date Difference & Duration Calculator
Calculate exact days, weeks, months, and business days between any two dates.
Online Video Cutter (Ezgif Cut Video)
Cut and trim video clips online by specifying exact start and end times in seconds.
AI Profile Bio Generator (LinkedIn, X, GitHub)
Generate high-impact personal bios tailored to platform character limits.
TDEE & Calorie Burn Calculator
Calculate Total Daily Energy Expenditure (TDEE), BMR, and cutting/bulking calories.
Add Page Numbers to PDF
Insert custom page numbers into PDF documents with position, margin, and format controls.
Bulk File Renamer (Ezgif Bulk Renamer)
Rename hundreds of files at once with prefixes, numbering, find & replace, and case conversions.
AI Plain English to Excel & Sheets Formula Copilot
Convert plain English instructions into Excel and Google Sheets formulas with explanations.
Bionic Reading Converter
Convert any text into high-focus Bionic Reading format to boost speed and comprehension.
Random Number Generator
Generate random numbers in any range — integers or decimals, unique or repeatable.
Scientific Calculator Online
Free online scientific calculator with trigonometric, logarithmic, and exponential functions.
Protect PDF with Password
Encrypt and password-protect confidential PDF files directly in your browser.
AI FAQ & Schema Markup Builder
Generate high-intent FAQs with Google-compliant JSON-LD FAQPage structured data.
Upside Down & Reverse Text Generator
Flip your text upside down (˙ʇxǝʇ uʍop ǝpᴉsdn) or backwards in real-time.
Dice Roller & Coin Flipper
Virtual polyhedral 3D dice roller (d4, d6, d8, d10, d12, d20, d100) and heads or tails coin flipper.
PDF Metadata Editor & Inspector
View, edit, or remove Title, Author, Subject, and Keywords metadata from PDF files.
Zalgo Glitch & Cursed Text Generator
Generate eerie glitch, corrupted, and cursed Zalgo text with chaos controls.
Age & Birthday Countdown Calculator
Calculate exact age in years, months, days, hours, and minutes, plus next birthday countdown.
Steps to Miles & Kilometers Calculator
Convert walking steps to miles, kilometers, calories burned, and estimated walking time.
Slug to Title & Heading Converter
Convert URL slugs, snake_case, and kebab-case into clean, grammatical titles.
AI Prompt Optimizer & Studio (ChatGPT & Midjourney)
Engineer elite prompts for ChatGPT, Claude, Midjourney, and DALL-E with personas and constraints.
Discount & Sale Price Calculator
Calculate sale savings, promo code discounts, and final price with tax.
Profit and Loss (P&L) & Break-Even Calculator
Calculate net profit margin, operating profit, and break-even sales unit volume for businesses.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base (2–36).
Tip & Bill Split Calculator
Calculate restaurant tips and easily split bills evenly among friends.
CSV to JSON Converter
Convert CSV to JSON and JSON to CSV with correct quote and delimiter handling.
BMI & Body Mass Index Calculator
Calculate Body Mass Index (BMI), healthy weight range, and WHO weight status.
HTML Entity Encoder & Decoder
Encode special characters into HTML entities or decode entities back into raw text.
CSS Clamp & Fluid Typography Generator
Generate responsive CSS clamp() font sizes that scale smoothly with the viewport.
Crypto Profit & Loss Calculator
Calculate cryptocurrency returns, net profit/loss, ROI %, and exchange fees.
CSS Gradient Generator
Generate beautiful CSS linear and radial gradients with customizable color stops and angle controls.
Inflation & Purchasing Power Calculator
Calculate how inflation erodes purchasing power over time with year-by-year breakdowns.
Image Comparator (Before & After Slider)
Compare two images side-by-side or with an interactive draggable split slider.
CSS Box Shadow Generator
Visually create and customize soft, realistic CSS box-shadows with real-time controls.
CSS Glassmorphism Generator
Generate modern frosted glass CSS UI effects with backdrop-blur and border transparency.
IPv4 CIDR Subnet Calculator
Calculate network ranges, broadcast IP, netmask, wildcard, and usable host capacity from any CIDR.
cURL to Fetch & Axios Converter
Convert raw cURL commands instantly into JavaScript Fetch, Axios, Python Requests, and Go HTTP client code.
Free Image Background Remover & Transparent PNG Maker
Remove solid white, black, green screen backgrounds and create transparent PNG photos.
Animated GIF Maker (Images to GIF)
Combine multiple images or photos into an animated GIF with customizable frame rates and resolution.
SQL Formatter & Beautifier
Format, indent, and beautify messy SQL queries with uppercase keyword styling.
CSS Neumorphism (Soft UI) Generator
Design soft UI / neumorphic components with realistic dual-shadow highlights and CSS code export.
Remove EXIF Metadata from Images (EXIF Cleaner)
Strip camera details, GPS location data, timestamps, and device info from photos.
YAML to JSON & JSON to YAML Converter
Bi-directional converter between YAML and JSON formats with real-time syntax validation.
CSS Border Radius & Blob Generator
Design organic blob shapes and 8-point fancy border-radius curves with interactive sliders.
Image to Data URI & Base64 Converter
Convert images to Base64 Data URI strings for inline embedding in HTML and CSS.
Chmod Permissions Calculator
Calculate Linux / Unix chmod file permissions in numeric (octal) and symbolic notation.
CSS Flexbox Playground & Generator
Interactive visual flexbox playground with real-time CSS and Tailwind code generation.
JPG to PDF Converter (Ezgif JPG to PDF)
Convert JPG / JPEG photos into high-quality PDF documents with custom page sizing.
JavaScript KeyCode & Keyboard Event Inspector
Press any key to inspect event.key, event.code, event.keyCode, and modifier flags.
AVIF to JPG Converter (Ezgif AVIF to JPG)
Convert next-generation AVIF images into universally compatible JPG / JPEG format.
Code Minifier (HTML, CSS, JS, JSON)
Minify HTML, CSS, JavaScript, and JSON code by stripping unnecessary whitespace and comments.
HEIC to JPG Converter (Ezgif HEIC Converter)
Convert Apple iPhone HEIC and HEIF photos into universally compatible JPG format.
Lorem Ipsum Dummy Text Generator
Generate placeholder dummy text by paragraphs, sentences, words, or HTML lists.
BMP to PNG Converter (Ezgif BMP Converter)
Convert bitmap BMP images into compressed PNG format with transparency preservation.
URL Slug Generator
Convert article titles and headlines into clean, SEO-friendly kebab-case URL slugs.
Bulk Image Converter (Ezgif Bulk Converters)
Batch convert hundreds of images between WebP, AVIF, PNG, JPG, and BMP simultaneously.
Readability Score & Grade Level Calculator
Calculate Flesch Reading Ease, Flesch-Kincaid Grade Level, and reading metrics.
Online Metadata Viewer (Ezgif Metadata Viewer)
Inspect EXIF data, file headers, dimensions, camera settings, and color profiles.
Markdown Table Generator
Interactive visual spreadsheet editor to generate clean Markdown and HTML tables.
Lottie & TGS to GIF Converter (Ezgif Lottie to GIF)
Convert Lottie JSON and Telegram TGS vector animations into animated GIF or WebM format.
Binary to Text & Text to Binary Converter
Convert plain text to 8-bit binary code (0s and 1s) and decode binary back to English text.
ROT13 & Caesar Cipher Encoder/Decoder
Encode and decode text using ROT13 or custom Caesar shift ciphers.
SRT to VTT & VTT to SRT Subtitle Converter
Convert video subtitle files between SubRip (.srt) and WebVTT (.vtt) formats online.
Aspect Ratio Calculator
Calculate dimensions and scale images, videos, and screens across standard aspect ratios.
Image Cropper Online
Crop images online using HTML5 canvas with square, 16:9, and custom aspect ratios.
SVG to PNG Converter
Convert SVG vector files or raw code into crisp high-resolution PNG images.
Favicon Generator & HTML Icon Tags
Generate standard multi-size website favicons (16x16, 32x32, 48x48, 180x180) and HTML link tags.
Meme Generator Online
Create funny memes online with custom top and bottom text, font styles, and templates.
Image Filters & Photo Studio Online
Apply brightness, contrast, grayscale, sepia, invert, and blur filters with live preview.
ASCII Art & Text Banner Generator
Convert plain text headlines or images into retro ASCII character art and banners.
PNG to JPG Converter
Convert PNG images to JPG/JPEG with adjustable quality — batch supported.
PNG to WebP Converter
Convert PNG images to modern WebP for much smaller files — transparency preserved.
JPG to PNG Converter
Convert JPG/JPEG photos to lossless PNG images — batch supported.
JPG to WebP Converter
Convert JPG/JPEG images to WebP for smaller, faster-loading files.
WebP to PNG Converter
Convert WebP images to widely-compatible PNG — transparency preserved.
WebP to JPG Converter
Convert WebP images to universally-compatible JPG/JPEG files.
PNG to ICO Converter
Turn a PNG into a multi-resolution Windows .ico favicon file.
JPG to ICO Converter
Convert a JPG/JPEG image into a multi-resolution Windows .ico icon.
WebP to ICO Converter
Convert a WebP image into a multi-resolution Windows .ico icon.
Image to PDF Converter
Combine JPG, PNG and WebP images into a single PDF — reorder pages, pick size.
Image Resizer
Resize images by pixels or percentage — scale up or down with aspect lock.
Image Size Checker
Check image dimensions, total pixels, megapixels, aspect ratio and print size.
Image Combiner
Merge multiple images side-by-side, stacked, or in a grid into one image.
Text Repeater
Repeat any text or word multiple times with custom separators and optional numbering.
Number to Words Converter
Spell out any number in English words, including decimals and US currency.
Average Calculator
Calculate mean, median, mode, range, variance, and standard deviation from a list of numbers.
XML Formatter & Validator
Beautify, minify, and validate XML with adjustable indentation — all in your browser.
Markdown Previewer
Write Markdown and see the rendered HTML live, side by side, in your browser.
More Tools Added in Future on Demand & Requirements
Need a tool that isn't in our catalog yet? We build and release new 100% private, client-side tools based directly on user feedback and workflow requirements. Submit your idea, and our team will build it for you for free.