Free online tools that do one thing, fast

Format JSON, compress an image, merge a PDF, mock up a fake iMessage screenshot for the group chat. 630 single-purpose tools across 15 categories, and most run right in your browser, so your files never get uploaded anywhere and there's nothing to install.

Quick start

most-used tools

1JSON FormatterDeveloper Tools 2Password GeneratorSecurity Tools 3Image CompressorImage Tools 4QR Code GeneratorData Tools 5PDF MergerPDF Tools 6WhatsApp Chat GeneratorSocial Media Tools 7Word CounterText Tools 8Color PickerColor Tools

Developer Tools

81 tools

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Essential utilities for developers, formatters, encoders, generators, parsers, and debugging helpers.

JSON Formatter

Format, beautify and validate JSON instantly online

JSON Validator

Validate JSON syntax and find errors with line and column numbers

URL Parser

Parse and inspect URL components including query parameters

Cron Builder

Build cron expressions visually, five fields, instant English description, common presets for every-minute through monthly schedules.

CSS Animation Generator

Build CSS keyframe animations with 10 presets, fade, slide, pulse, shake, bounce, spin, wiggle, pop, and tune duration, easing, count, direction.

CSS Border Radius Generator

Visual border-radius builder, independent corners, px or % unit, instant preview, copy-ready CSS.

CSS Box Shadow Generator

Build any CSS box-shadow visually with sliders for offset, blur, spread, and color, with instant preview and copy-ready output.

CSS Clamp Generator

Turn a min and max font size into a fluid CSS clamp() that scales with the viewport. Drag a viewport slider to preview the exact size at any width.

CSS Filter Generator

Build CSS filter chains visually, blur, brightness, contrast, saturate, hue-rotate, sepia, grayscale, invert, opacity, with live preview.

+72 more

Image Tools

36 tools

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Compress, resize, convert, and edit images directly in your browser. Supports PNG, JPG, WebP, SVG, and more.

Image Compressor

Compress images to reduce file size while preserving quality

Image Resizer

Resize images to specific dimensions with aspect ratio control

AVIF Converter

Convert images to AVIF format for maximum compression efficiency

Image Placeholder Generator

Build placeholder image URLs from popular providers, placehold.co for solid colors, picsum.photos for random photos, DiceBear for avatars.

Image Sharpen

Sharpen blurry photos with an adjustable strength slider, server-side using Sharp's unsharp-mask filter.

Background Remover

Cut the background out of any photo and get back a clean transparent PNG. Pick a photo, hit one button, download.

Base64 to Image

Convert Base64 data URLs back into downloadable images

Duotone Generator

Apply a two-color duotone effect to any photo in your browser. Pick the shadow and highlight colors, try presets, and download the result as PNG.

EXIF Data Remover

Strip EXIF metadata from images for privacy protection

+27 more

PDF Tools

31 tools

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Merge, split, compress, rotate, and protect PDF files. No software installation needed.

Compare PDF

Spot the text differences between two PDFs. See exactly what was added or removed, line by line, in your browser.

Crop PDF

Trim the margins off every page in a PDF, right in your browser. Set a uniform margin or top, right, bottom, left.

CSV to PDF

Turn a CSV file into a clean, readable PDF table with proper rows and columns, ready to print or share.

Excel to PDF

Turn Excel spreadsheets (.xlsx or .xls) into clean PDF documents you can share, print, or attach anywhere.

Extract PDF Pages

Pick specific pages from a PDF and pull them into a new, smaller document

HTML to PDF

Convert an HTML file into a PDF, with text, styling, and images rendered onto fixed pages.

JPG to PDF

Turn one or many JPG photos into a single PDF, right in your browser. Pick page size, reorder pages, download.

OCR PDF

Pull selectable text out of scanned or image-only PDFs using OCR, with support for nine languages and a confidence score on every result.

PDF Compressor

Reduce PDF file size while keeping text sharp and pages readable

+22 more

Text Tools

53 tools

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Transform, analyze, format, and clean text with powerful string manipulation utilities.

Word Counter

Count words, characters, sentences, and paragraphs in real-time

Bionic Reading Converter

Convert any text into a bionic reading format that bolds the start of each word to guide your eyes. Adjust the fixation strength and font size.

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more

Fancy Text Generator

Generate stylish Unicode text variants like bold, italic, script, and more

Markdown Cheat Sheet

Searchable Markdown reference, every syntax (headings, lists, links, tables, footnotes, code) with copy-to-clipboard examples.

Markdown TOC Generator

Extract headings from any Markdown document and build a hyperlinked table of contents, adjustable level range and live preview.

Online Notepad

A clean online notepad that saves automatically in your browser. Jot notes, see live word and character counts, then download or copy when you are done.

Random Quote Generator

Pull a random inspirational quote from a curated set, get a new one with one click, copy with author attribution.

Random Word Generator

Pick random words from curated lists of nouns, adjectives, and verbs, filter by length, generate up to 100 at once.

+44 more

SEO Tools

24 tools

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Analyze keywords, check meta tags, generate sitemaps, and optimize your content for search engines.

Meta Tag Generator

Generate HTML meta tags for SEO with a live Google SERP preview

Schema Markup Generator

Generate JSON-LD structured data for rich search results

UTM Builder

Build campaign URLs with UTM parameters for tracking

Breadcrumb Schema Generator

Build a breadcrumb trail and export valid BreadcrumbList JSON-LD with correct position numbering for Google.

Cookie Policy Generator

Build a clear cookie policy from a short form. Pick your cookie categories and third-party tools, then copy or download the text.

Disclaimer Generator

Build a website disclaimer in minutes. Pick the sections you need, add your site name, and copy clean text.

FAQ Schema Generator

Build valid FAQPage JSON-LD from your own question and answer pairs, then copy a ready-to-paste script tag.

Return Policy Generator

Build a clear return and refund policy for your online store in seconds. Set the return window, refund method, shipping rules, and non-returnable items.

Anchor Text Analyzer

Extract and analyze anchor text from HTML to optimize your link profile

+15 more

Data Tools

49 tools

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Generate fake data, validate formats, create barcodes, QR codes, and work with structured data.

QR Code Generator

Generate QR codes for text, URLs, emails, phone numbers, WiFi networks, and vCards

Coin Flip Simulator

Flip a virtual coin one at a time or in batches up to 1,000. Tracks heads/tails ratio, longest run, and full flip history.

Countdown Timer

A simple online countdown timer with a clear display and an alarm. Set hours, minutes, and seconds, use a quick preset, and get a beep when time is up.

Country Code Lookup

Search 120+ countries by name, ISO-2 (US), ISO-3 (USA), numeric code, or international dialing code (+1), all four shown side by side.

CSV to JSON Converter

Convert CSV data to JSON format instantly online with support for quoted fields and type detection

Decision Wheel

Spin a colorful wheel with your custom options to make any decision randomly, perfect for picking dinner, group choices, or breaking ties.

Dice Roller

Roll any dice, d4, d6, d8, d10, d12, d20, d100, singly or in batches, with modifiers and full RPG dice notation (3d6+2).

Email Validator

Validate email addresses by RFC syntax rules, bulk-check a list, see specific failure reasons, and get typo suggestions for common domain misspellings.

JSON to TypeScript

Generate TypeScript interfaces from JSON data with recursive type inference and nested object support

+40 more

Color Tools

16 tools

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Pick colors, generate palettes, check contrast, and convert between color formats.

Color Picker

Pick any color and get its HEX, RGB, and HSL values instantly

Contrast Checker

Check WCAG color contrast ratios for accessibility compliance

Palette Generator

Generate beautiful color palettes using color harmony rules

Random Hex Palette

Roll fully random hex color palettes, lock the swatches you like, then reshuffle the rest. 2-10 colors per palette.

Color Blindness Simulator

See how colors appear to people with different types of color blindness

Color Format Converter

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats

Color Harmony Finder

Find harmonious color combinations using color theory and a visual color wheel

Color Mixer

Mix two or more colors using RGB or HSL blending methods

Color Name Finder

Find the closest CSS named color for any HEX value

+7 more

Security Tools

21 tools

View all

Generate passwords, hash data, encrypt text, validate tokens, and test security configurations.

Password Generator

Generate strong, secure random passwords with customizable length and character sets

AES Encrypt / Decrypt

Encrypt and decrypt text using AES-256-GCM with password-based key derivation

Diceware Passphrase Generator

Generate strong memorable passphrases from a curated word list, adjustable count, separator, capitalization, optional number suffix.

Base64 Encode / Decode

Encode and decode Base64 strings with proper UTF-8 support and auto-detection

Caesar Cipher

Encrypt and decrypt text with the Caesar cipher, including brute force mode for all 25 shifts

CORS Generator

Build CORS header configurations for Express, Nginx, and Apache with an interactive builder

Credit Card Validator

Validate credit card number format using the Luhn algorithm and detect card type

CSP Generator

Build Content Security Policy headers with an interactive directive builder

Email Header Analyzer

Parse and analyze raw email headers to trace delivery path, authentication results, and metadata

+12 more

Math & Calculators

73 tools

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Calculate loans, convert units, solve equations, and work with numbers effortlessly.

Scientific Calculator

Full-featured scientific calculator with trigonometry, logarithms, exponents and more

Aspect Ratio Calculator

Compute pixel dimensions for any aspect ratio, give width, get height (or vice versa). 7 common ratio presets.

Calorie Calculator

Get your daily calorie target, BMR, TDEE, and macros, based on age, weight, height, activity, and whether you're cutting, maintaining, or bulking.

Crypto Profit Calculator

Work out crypto profit or loss from buy price, sell price, and quantity. Factor in exchange fees and see your ROI plus the break-even sell price.

Discount Calculator

Find the sale price from a discount percentage, or work backwards from two prices to figure out what percent off you actually got.

Dog Years Calculator

Convert dog age to human equivalent (or back) using the size-aware AVMA formula instead of the old "× 7" myth.

Gas Mileage Calculator

Compute fuel economy in MPG (US/UK), km/L, and L/100km, plus trip cost and cost-per-mile.

GPA Calculator

Add your courses, pick letter grades, set credit hours, get your GPA on the 4.0 scale. Adds and removes rows as you go.

Graphing Calculator

Plot functions like x^2, sin(x), or 1/x on an interactive graph. Pan by dragging, zoom with the wheel, and overlay several functions in different colors.

+64 more

AI Tools

54 tools

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Generate blog titles, meta tags, code comments, cover letters, and more with AI assistance.

Business Name Generator

Generate creative, brandable business name ideas instantly using AI

Instagram Caption Generator

Create engaging Instagram captions with hashtags using AI

SQL Query Generator

Generate SQL queries from plain English descriptions using AI

Article Summarizer

Summarize long articles into concise key points using AI

Blog Title Generator

Generate catchy, click-worthy blog titles using AI

Code Explainer

Get clear, line-by-line explanations of code snippets using AI

Hashtag Generator

Generate trending and relevant hashtags for any social platform

Regex Generator

Generate regular expressions from plain English descriptions using AI

YouTube Title Generator

Generate click-worthy YouTube video titles using AI

+45 more

Network Tools

15 tools

View all

Lookup DNS records, check SSL certificates, analyze HTTP headers, and troubleshoot connectivity.

DNS Lookup

Query DNS records for any domain including A, AAAA, MX, NS, TXT, and CNAME

SSL Certificate Checker

Check SSL/TLS certificate details and validity for any domain

Random IP Generator

Generate random valid IP addresses, public IPv4, private IPv4 (RFC 1918), or IPv6, in batches of up to 500.

CIDR Range Calculator

Calculate network details from CIDR notation including address range, subnet mask, and usable hosts

HTTP Headers Analyzer

Inspect and analyze HTTP response headers for any URL with security insights

IP Address Lookup

Look up geolocation and network information for any IP address

IPv4 to IPv6 Converter

Convert IPv4 addresses to their IPv6 mapped equivalents

MAC Address Lookup

Look up the vendor or manufacturer for any MAC address

My IP Address

Detect and display your current public IP address instantly

+6 more

Video Tools

20 tools

View all

Compress, trim, convert, and extract content from video files using server-side processing.

Video Compressor

Compress video files to reduce size while maintaining quality

Video Loop

Repeat any video N times back-to-back, fast lossless loop for memes, GIF replacements, and short repeating clips.

Video to GIF

Convert video clips to animated GIF images with control over FPS, width, start time and duration.

Video Trimmer

Trim and cut video files down to a specific time range

Add Audio to Video

Replace or set a video's audio track with your own music or voiceover file in seconds

Extract Audio from Video

Extract the audio track from a video file as MP3, WAV, or AAC

GIF Maker

Turn a stack of images into one animated GIF. Reorder frames, set the size and delay, preview, and download. Runs in your browser.

GIF to Video

Convert animated GIF images to MP4 or WebM video and cut file size

Merge Videos

Combine multiple video files into a single video clip

+11 more

Audio Tools

15 tools

View all

Convert formats, trim, compress, merge, and analyze audio files with professional-grade tools.

Audio Reverse

Reverse any audio file so it plays back-to-front, server-side using FFmpeg's areverse filter, format preserved.

Audio Compressor

Reduce audio file size by compressing to a lower bitrate

Audio Format Converter

Convert audio files between MP3, WAV, OGG, FLAC, and AAC formats

Audio Merger

Merge multiple audio files into a single track in the order you choose

Audio Recorder

Record microphone audio in your browser with a timer, level meter, pause, playback, and download as WebM or OGG.

Audio Speed Controller

Change the playback speed of audio files from 0.5x to 4x

Audio Trimmer

Trim audio files to the exact section you need with a drag-handle timeline

BPM Detector

Detect the tempo (BPM) of an audio file using peak detection analysis

Metronome

A browser-based metronome with adjustable tempo and time signatures

+6 more

Converter Tools

62 tools

View all

Convert between formats, JSON, CSV, XML, YAML, Markdown, units, currencies, and time zones.

Cooking Converter

Convert between cooking units, cups, tbsp, tsp, ml, oz, grams, lbs, and oven temperatures (°F, °C, gas mark).

Acres to Square Feet

Convert acres to square feet in your browser. One acre is exactly 43,560 sq ft. Live converter with a unit dropdown and a reference table for land and lots.

Bar to PSI

Convert bar to psi instantly. 1 bar equals 14.5038 psi. Live pressure converter with a reference table for tires, espresso, and diving. Browser-side.

CAMT to CSV

Convert a CAMT.053 bank statement (ISO 20022 XML) into a clean CSV with date, amount, currency, credit/debit, counterparty, and reference columns.

Celsius to Fahrenheit

Convert Celsius to Fahrenheit instantly. F = C x 9/5 + 32. Anchors: 0C is 32F, 100C is 212F, body temp 37C is 98.6F. Runs in your browser.

Celsius to Kelvin

Convert Celsius to Kelvin instantly. K = C + 273.15. Anchors: 0C is 273.15K, absolute zero is -273.15C (0K), 100C is 373.15K. Runs in browser.

CM to Inches

Convert centimeters to inches instantly in your browser. 1 inch equals 2.54 cm exactly, so 1 cm is 0.393701 inches. Live converter plus a reference table.

Color Format Converter Pro

Convert colors between HEX, RGB, HSL, HSV, CMYK, CSS modern syntax, and integer formats

CSV JSON Converter

Bidirectional converter between CSV and JSON formats with proper quoting and escaping

+53 more

About Toolsvu

Toolsvu is a browser-based hub of 630 small, single-purpose tools across 15 categories, text formatters, image processors, PDF utilities, color tools, social media mockups, AI helpers, SEO utilities, and a few dozen oddly-specific things you'll only need once but desperately need when you do. The whole point: stop sending you to 15 different sites for 15 different one-line tasks.

What happens to your files

Most tools finish the job on your device, so for formatting, encoding, color, regex, hashing and password work, nothing you enter leaves the page. The heavier jobs (image compression, PDF edits, video and audio conversion) need your file off the device for a moment; that copy is deleted within an hour whether or not you downloaded the result, and it's never stored or sold.

What's free, and why

Everything. No accounts, no rate limits, no premium tier hiding the useful version of a tool behind a paywall. Nothing you paste, upload, or generate is tracked; the only thing kept is your theme and your recently-used tools, both in your own browser.

Browse the full catalog

Developer Tools, essential utilities for developers, formatters, encoders, generators, parsers, and debugging helpers. 81 tools.
Image Tools, compress, resize, convert, and edit images directly in your browser. 36 tools.
PDF Tools, merge, split, compress, rotate, and protect pdf files. 31 tools.
Text Tools, transform, analyze, format, and clean text with powerful string manipulation utilities. 53 tools.
SEO Tools, analyze keywords, check meta tags, generate sitemaps, and optimize your content for search engines. 24 tools.
Data Tools, generate fake data, validate formats, create barcodes, qr codes, and work with structured data. 49 tools.
Color Tools, pick colors, generate palettes, check contrast, and convert between color formats. 16 tools.
Security Tools, generate passwords, hash data, encrypt text, validate tokens, and test security configurations. 21 tools.
Math & Calculators, calculate loans, convert units, solve equations, and work with numbers effortlessly. 73 tools.
AI Tools, generate blog titles, meta tags, code comments, cover letters, and more with ai assistance. 54 tools.
Network Tools, lookup dns records, check ssl certificates, analyze http headers, and troubleshoot connectivity. 15 tools.
Video Tools, compress, trim, convert, and extract content from video files using server-side processing. 20 tools.
Audio Tools, convert formats, trim, compress, merge, and analyze audio files with professional-grade tools. 15 tools.
Converter Tools, convert between formats, json, csv, xml, yaml, markdown, units, currencies, and time zones. 62 tools.
Social Media Tools, mockup generators, chat simulators, and content tools for every major social platform. 80 tools.