InputTestHub
Since 2026 · 2,284 tools · 19 categories

Every small tool you keep Googling, in one place.

Word counters, PDF merging, image compression, JSON formatting, SEO markup, YouTube titles, unit conversion and 2284 more. No account. No watermark. No upload — most tools run entirely inside your browser.

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19 shelves, 2284 tools. Every one opens instantly.

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Generate prompts, scripts, outlines, captions, emails and product copy in seconds.

AI Prompt GeneratorAI Image Prompt GeneratorMidjourney Prompt Generator

Meta tags, schema markup, sitemaps, keyword analysis and SERP previews.

Meta Tag GeneratorSERP Snippet PreviewKeyword Density Checker

Titles, tags, descriptions, hashtags, hooks and channel ideas for every platform.

YouTube Title GeneratorYouTube Tag GeneratorYouTube Description Generator

Format, validate, minify, encode, decode, diff and test — all client-side.

JSON FormatterJSON ValidatorJSON Minifier

Count, convert, clean, compare, sort and transform text instantly.

Word CounterCharacter CounterSentence Counter

Finance, health, maths, dates and business calculators with full workings.

Loan CalculatorEMI CalculatorMortgage Calculator

Length, weight, temperature, area, volume, speed, data, energy and more.

Length ConverterWeight ConverterArea Converter

Compress, resize, crop, rotate and convert images without uploading them.

Image CompressorImage ResizerImage Cropper

Merge, split, rotate, compress, protect and convert PDF files locally.

Merge PDFSplit PDFCompress PDF

Palettes, gradients, contrast checks, shadows and CSS generators.

Colour Code ConverterColour PickerHEX to RGB Converter

Hashes, encoders, password strength, checksums and encryption helpers.

Password GeneratorDiceware Passphrase GeneratorPassword Strength Checker

Live exchange rates for 160 currencies, with the mid-market rate and the inverse shown every time.

Currency ConverterUSD to PKR ConverterPKR to USD Converter

Read text out of photos, screenshots and scans without uploading the image anywhere.

Image to Text (OCR)Screenshot to TextScanned Image to Text

Compress, convert, trim and record video and audio without uploading a single file.

Video CompressorVideo ConverterVideo Trimmer

Typing weakness analysis, keyboard layout comparison, text forensics and display bandwidth maths.

Aspect Ratio CalculatorTyping Weakness AnalyzerKeyboard Layout Comparison

Test your keyboard, mouse, gamepad, camera, sensors and system — live, in the browser.

Keyboard TestOnline Keyboard TesterTKL Keyboard Test

Dead pixels, backlight bleed, refresh rate, ghosting, colour accuracy and contrast.

White ScreenBlack ScreenRed Screen

Test speakers, headphones, bass, stereo channels, microphones and your hearing.

Speaker TestLeft Right Speaker TestHeadphone Test

Passwords, UUIDs, QR codes, dummy data, names, numbers and more.

QR Code GeneratorBarcode GeneratorLorem Ipsum Generator

Unit Converters

1079
All 1079 converters tools
01 popular

Length Converter

Converts between 15 length and distance units instantly, showing the exact conversion…

02 popular

Weight Converter

Converts between 21 weight and mass units instantly, showing the exact conversion factor…

03

Area Converter

Converts between 25 area units instantly, showing the exact conversion factor and a full…

04 popular

Volume Converter

Converts between 21 volume and capacity units instantly, showing the exact conversion…

05

Speed Converter

Converts between 7 speed and velocity units instantly, showing the exact conversion factor…

06

Time Converter

Converts between 11 time units instantly, showing the exact conversion factor and a full…

08

Pressure Converter

Converts between 10 pressure units instantly, showing the exact conversion factor and a…

01 popular

Loan Calculator

Works out the monthly payment, total interest and full repayment schedule for any loan…

02 popular

EMI Calculator

Calculates your Equated Monthly Instalment with a full principal-versus-interest breakdown…

03 popular

Mortgage Calculator

Estimates a full monthly housing payment including principal, interest, property tax…

04

Car Loan Calculator

Calculates a car finance payment from the price, deposit, trade-in, interest rate and…

Security & Encoding Tools

100
All 100 security tools
01 popular

Password Generator

Generates cryptographically strong random passwords and passphrases with full control over…

03 popular

Password Strength Checker

Estimates password entropy and crack time, and identifies the specific weaknesses in what…

05 popular

Hash Generator

Generates MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, all at once.

06

MD5 Hash Generator

Generates an MD5 hash of any text or string, with optional HMAC and uppercase output.

08

SHA-1 Hash Generator

Generates SHA-1 hashes, still required by some legacy systems and Git object addressing.

Developer Tools

92
All 92 developer tools
01 popular

JSON Formatter

Formats, indents and validates JSON with precise error positions, key sorting and a…

02 popular

JSON Validator

Checks whether JSON is valid and reports the exact line, column and reason for the first…

03

JSON Minifier

Strips all whitespace from JSON to produce the smallest valid output, showing the bytes…

04 popular

JSON to CSV Converter

Converts a JSON array of objects into CSV, flattening nested keys and handling missing…

05 popular

CSV to JSON Converter

Turns CSV or TSV into a JSON array of objects, with type detection for numbers and booleans.

06

JSON to XML Converter

Converts JSON into well-formed XML with a configurable root element and array item naming.

07

XML to JSON Converter

Parses XML and converts it to JSON, preserving attributes and handling repeated elements…

08

JSON to YAML Converter

Converts JSON to clean YAML with correct indentation, quoting and multi-line string…

Text Tools

92
All 92 text tools
01 popular

Word Counter

Counts words, characters, sentences, paragraphs and reading time live as you type, using…

02 popular

Character Counter

Counts characters with and without spaces and shows live progress against Twitter, SMS…

03

Sentence Counter

Counts sentences in any text and shows average sentence length, longest sentence and how…

04

Paragraph Counter

Counts paragraphs, shows the word count of each one and flags paragraphs that are too long…

05

Line Counter

Counts total lines, non-empty lines, duplicate lines and the longest line in any pasted…

06 popular

Word Frequency Counter

Ranks every word in your text by how often it appears, with stop words removed and one…

AI Writing Tools

70
All 70 ai writing tools
01 popular

AI Prompt Generator

Builds structured prompts with role, context, task, constraints, format and examples — the…

02 popular

AI Image Prompt Generator

Builds detailed image prompts with subject, style, lighting, composition, lens and quality…

04

Prompt Optimiser

Rewrites a rough prompt into a structured one and explains what was missing and why it…

05

System Prompt Generator

Writes system prompts for chatbots and agents, covering role, scope, tone, refusal rules…

06 popular

Blog Outline Generator

Builds a full article outline with H2s, H3s, talking points per section, an FAQ block and…

SEO Tools

56
All 56 seo tools
01 popular

Meta Tag Generator

Generates every meta tag a page needs — title, description, canonical, robots, Open Graph…

02 popular

SERP Snippet Preview

Shows exactly how your title and description will appear in Google results on desktop and…

03 popular

Keyword Density Checker

Analyses keyword density for single words and two- and three-word phrases, with stop words…

04 popular

Schema Markup Generator

Builds valid JSON-LD structured data for Article, FAQ, HowTo, Product, LocalBusiness…

05 popular

Robots.txt Generator

Builds a robots.txt file with per-crawler rules, crawl delay, sitemap references and AI…

06

Robots.txt Tester

Tests whether a given URL is allowed or blocked by a robots.txt file, showing which rule…

07 popular

XML Sitemap Generator

Generates a valid XML sitemap from a list of URLs, with lastmod, changefreq and priority…

08

Canonical URL Generator

Builds canonical link tags and shows how to canonicalise parameters, pagination and…

Device & Hardware Tests

53
All 53 device tests tools
01 popular

Keyboard Test

Test keyboard keys, inspect repeated inputs and review a local test summary. Get clear…

02

Online Keyboard Tester

A full-size keyboard tester that runs in the browser with nothing to install. Every key…

03

TKL Keyboard Test

Tests a tenkeyless keyboard — the full layout minus the number pad — including the…

04

60% Keyboard Test

Tests a compact 60% or 65% keyboard: the alphanumeric block, modifiers and arrows, without…

05

Numpad Test

Tests every key on the number pad, including Num Lock, the operators and the separate…

06

Arrow Key Test

Tests the four arrow keys on their own. Useful when only the direction keys have stopped…

07

Function Key Test

Tests the F1 to F12 row and shows which keys your browser intercepts before the page can…

08

Modifier Key Test

Tests Shift, Ctrl, Alt, Meta, Caps Lock, Tab and Escape, telling the left and right…

Generators & Random Tools

53
All 53 generators tools
01 popular

QR Code Generator

Creates QR codes for links, WiFi, contacts, email, SMS and plain text, downloadable as PNG…

02 popular

Barcode Generator

Generates Code 128, EAN-13, UPC-A, Code 39 and ITF barcodes as PNG or SVG with…

03 popular

Lorem Ipsum Generator

Generates classic Lorem Ipsum placeholder text by paragraph, sentence, word or list item…

04 popular

Random Number Generator

Generates truly random numbers in any range, with or without repeats, using the browser's…

05 popular

Random Picker

Picks one or more random items from a list you paste — names, options, prizes or anything…

07 popular

Dice Roller

Rolls any number of dice with any number of sides, with modifiers and standard RPG…

08

Coin Flip

Flips a fair virtual coin once or thousands of times, with a running tally of heads and…

YouTube & Social Media Tools

50
All 50 youtube & social tools
01 popular

YouTube Title Generator

Generates YouTube titles built on proven formats, each checked against the 60-character…

02 popular

YouTube Tag Generator

Generates a full set of YouTube tags from your topic — exact, broad, long-tail and…

04 popular

YouTube Hook Generator

Writes opening lines for the first 15 seconds using the patterns that hold viewers past…

08 popular

Thumbnail Text Analyser

Checks thumbnail text for length, readability at small sizes and overlap with the video…

Image Tools

42
All 42 image tools
01 popular

Image Compressor

Compresses images to a target quality or file size in your browser, with a live…

02 popular

Image Resizer

Resizes images to exact pixel dimensions or a percentage, with aspect ratio locking and…

03 popular

Image Cropper

Crops images to a free selection or a fixed aspect ratio, with pixel-accurate coordinates.

04 popular

Image Format Converter

Converts between JPG, PNG, WebP and BMP, with transparency handling and quality control.

05

JPG to PNG Converter

Converts JPG images to lossless PNG, useful when you need to edit further without adding…

06

PNG to JPG Converter

Converts PNG to JPG with adjustable quality and a chosen background colour where the PNG…

07

PNG to WebP Converter

Converts PNG to WebP, keeping transparency and typically cutting file size by a third or…

Currency Converter

41
All 41 currency tools
01 popular

Currency Converter

Converts between 160 currencies at live mid-market rates, with the exact rate, the inverse…

02 popular

USD to PKR Converter

Converts US Dollar to Pakistani Rupee at the live mid-market rate, with the inverse rate…

03

PKR to USD Converter

Converts Pakistani Rupee to US Dollar at the live mid-market rate, with the inverse rate…

04

USD to INR Converter

Converts US Dollar to Indian Rupee at the live mid-market rate, with the inverse rate and…

05

INR to USD Converter

Converts Indian Rupee to US Dollar at the live mid-market rate, with the inverse rate and…

06

GBP to PKR Converter

Converts British Pound to Pakistani Rupee at the live mid-market rate, with the inverse…

07

PKR to GBP Converter

Converts Pakistani Rupee to British Pound at the live mid-market rate, with the inverse…

08

EUR to PKR Converter

Converts Euro to Pakistani Rupee at the live mid-market rate, with the inverse rate and a…

Screen & Display Tests

38
All 38 screen tests tools
01

White Screen

Fills your entire screen with solid white. Cleaning the screen, spotting dust and dark…

02

Black Screen

Fills your entire screen with solid black. Finding stuck pixels, backlight bleed and IPS…

03

Red Screen

Fills your entire screen with solid red. Checking the red sub-pixels across the panel and…

04

Green Screen

Fills your entire screen with solid green. Checking green sub-pixels — the channel the eye…

05

Blue Screen

Fills your entire screen with solid blue. Checking blue sub-pixels and spotting the colour…

06

Cyan Screen

Fills your entire screen with solid cyan. Testing green and blue together, which often…

07

Magenta Screen

Fills your entire screen with solid magenta. Testing red and blue together and checking…

08

Yellow Screen

Fills your entire screen with solid yellow. Testing red and green together — the brightest…

Colour & Design Tools

33
All 33 colour & design tools
01 popular

Colour Code Converter

Converts colours between HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK, LAB and named CSS colours.

02 popular

Colour Picker

Picks any colour and shows its HEX, RGB, HSL, HSV, CMYK and LAB values, plus tints, shades…

03 popular

HEX to RGB Converter

Converts HEX colour codes to RGB and RGBA values, handling 3, 4, 6 and 8 digit hex.

04

RGB to HEX Converter

Converts RGB and RGBA values into HEX colour codes, including 8-digit hex with alpha.

05

HSL Colour Converter

Converts between HSL, HEX and RGB, so you can adjust lightness and saturation predictably.

06

CMYK Colour Converter

Converts between CMYK and RGB or HEX for print work, with a note on gamut differences.

07 popular

Colour Palette Generator

Builds harmonious palettes from a base colour using complementary, analogous, triadic…

Lab — Tools You Will Not Find Elsewhere

30
All 30 lab tools
01 popular

Aspect Ratio Calculator

Simplifies any dimensions to a ratio, solves for a missing side, and shows how much crop…

02 popular

Typing Weakness Analyzer

Times every keystroke, finds the exact letter pairs slowing you down, and writes a…

03 popular

Keyboard Layout Comparison

Measures finger travel, same-finger pairs and hand alternation for QWERTY, Dvorak, Colemak…

05 popular

Mojibake Fixer

Repairs text mangled by the wrong character encoding — the "’" and "é" problem — by…

PDF & Document Tools

28
All 28 pdf tools
01 popular

Merge PDF

Combines multiple PDF files into one in your browser, with drag-to-reorder and no page…

02 popular

Split PDF

Splits a PDF into separate files by page range, every N pages, or one file per page.

03 popular

Compress PDF

Reduces PDF file size by recompressing embedded images, with a quality setting and a size…

04

Rotate PDF Pages

Rotates all pages or selected pages by 90, 180 or 270 degrees and saves the result.

06

Extract Pages from PDF

Pulls selected pages out of a PDF into a new document, keeping the original untouched.

07

Reorder PDF Pages

Rearranges pages into any order you specify, including reversing the whole document.

08 popular

Image to PDF Converter

Turns JPG, PNG and WebP images into a single PDF with page size, orientation and margin…

Video & Audio Tools

23
All 23 video & audio tools
01 popular

Video Compressor

Shrinks a video so it fits an email or a WhatsApp limit, re-encoding with H.264 in your…

02 popular

Video Converter

Converts between MP4, WebM, MKV, MOV and AVI in your browser, so an unplayable file…

03 popular

Video Trimmer

Cuts a section out of a video by start and end time, copying the streams so there is no…

04 popular

Video to GIF Converter

Turns a section of video into an animated GIF with a proper generated palette, so colours…

05 popular

Video to MP3 Converter

Extracts the audio track from a video and saves it as MP3, WAV or M4A. The video never…

06

Remove Audio from Video

Strips the sound from a video and copies the picture untouched, so there is no quality…

07

Video Speed Changer

Speeds a video up or slows it down, keeping the audio in sync and at the correct pitch…

08

Video Resizer

Scales a video to 480p, 720p, 1080p or any height you choose, keeping the aspect ratio…

Audio & Microphone Tests

18
All 18 audio tests tools
01 popular

Speaker Test

Plays test tones through the left, right and both channels so you can confirm every…

02

Left Right Speaker Test

Plays a tone in one channel at a time, with a panel that lights up on the matching side so…

03

Headphone Test

Checks both headphone drivers with separate left and right tones, and confirms the stereo…

04

Stereo Test

Confirms that stereo separation is working by playing distinct tones in each channel and…

05

Audio Balance Test

Alternates between channels so you can hear whether one side is quieter, and adjust the…

06 popular

Online Tone Generator

Generates a pure tone at any frequency from 1 Hz to 22 kHz, with a choice of waveform…

07 popular

Bass Test

Sweeps from 20 Hz up to 200 Hz so you can hear exactly how low your speakers or headphones…

08

Subwoofer Test

A slow sweep from 10 Hz to 120 Hz for checking how deep a subwoofer really goes and where…

OCR & Text Recognition

4
All 4 ocr tools
01 popular

Image to Text (OCR)

Reads the text out of a photo, screenshot or scan and gives you it as plain text. Runs in…

02

Screenshot to Text

Turns a screenshot into copyable text — useful when an app, an error dialog or a PDF…

03

Scanned Image to Text

Reads printed text from a scan or a photographed document page, for when the file has no…

04

Image Table to CSV

Reads a table out of a screenshot and rebuilds it as CSV by grouping words into rows and…

Why this site is built the way it is

Your file never leaves your device

Image and PDF tools use Canvas and WebAssembly in your own browser. There is no upload, no queue, no temporary copy on a server and nothing to delete afterwards. Open your Network tab and watch it stay quiet.

No sign-up, no drip-feed limits

No "3 free conversions per day", no email wall before the download button, no watermark on the output. Every tool on this site does the whole job the first time you open it.

The working is shown, not hidden

Calculators print the formula and every intermediate value. Converters print the exact factor used. If a result looks wrong you can check it by hand instead of guessing what the page did.