Softonic Tools

kW to Amps Converter

Convert kilowatts to amps for DC, single-phase and three-phase circuits. Supply voltage and power factor included for accurate electrical sizing.

Land Transfer Tax Calculator

Estimate land transfer tax on a property purchase using tiered regional rates. Accounts for first-time-buyer rebates and city-level surtaxes.

Law of Cosines Calculator

Solve for the third side of any triangle with c = sqrt(a^2 + b^2 - 2ab·cos C). Enter two sides and the included angle to get side c instantly.

Law of Sines Calculator

Enter angle A, its opposite side a, and angle B. The law of sines calculator returns side b, side c and angle C instantly, with the worked formula.

LBS to KG Converter

Convert pounds to kilograms using the exact 0.45359237 factor. Ideal for medication dosing, shipping labels and international recipe conversion.

LCM Calculator

Find the least common multiple of two or more integers. See prime factorizations and the GCD-based shortcut used in arithmetic proofs.

Lean Body Mass Calculator

Estimate lean body mass from height, weight and gender. Compare the Boer, James and Hume formulas used by clinicians and drug-dosing protocols.

LED Resistor Calculator

Calculate the series resistor to drive an LED safely from a supply voltage. Get resistance in ohms, nearest E12 value and required power rating.

Length Converter

Convert between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. Also handles nautical miles and the US survey foot.

Letter Boxed Solver

Solve the NYT Letter Boxed puzzle. Enter the four sides of the box and the solver lists valid words and two-word solutions covering every letter.

Letter Template Generator

Generate formatted letter templates ready to download. Covers formal business letters, cover letters, resignation notices and thank-you follow-ups.

License Generator

Generate the full text of open source licenses with your name and year filled in. Covers MIT, Apache 2.0, GPLv3, BSD-3, MPL-2.0 and CC licenses.

Life Path Number Calculator

Calculate your numerology life path number from your birthday. See the reduced digit and read the personality meaning from the Pythagorean system.

Limits Calculator

Compute the limit of a function as x approaches a value, from the left, from the right or both. Handles polynomials, rationals, trig and exponentials.

Linear Regression Calculator

Fit a least-squares line through (x, y) data. Get slope, intercept, R², Pearson r and an equation ready to paste into a spreadsheet.

Line Break Remover

Remove, replace or collapse line breaks in text. Handles hard-wrapped emails, PDF-extracted paragraphs and copy-pasted columns.

Line Counter

Count lines in any block of text or code. Get total, non-empty, blank, unique and duplicate line counts instantly for audits and size checks.

Lined Paper Generator

Make printable lined paper free. Choose college, wide or narrow rule, set line spacing in mm, paper size and a margin line, then print or download the SVG.

Link Shortener Decoder

Expand bit.ly, t.co, tinyurl and other short links. See every redirect hop, status code and the final destination before you click.

List Compare Tool

Paste two lists and instantly see common items, items only in list A, items only in list B, with case and whitespace normalization.

Line Break Remover

Remove, replace or collapse line breaks in text. Handles hard-wrapped emails, PDF-extracted paragraphs and copy-pasted columns.

Line Counter

Count lines in any block of text or code. Get total, non-empty, blank, unique and duplicate line counts instantly for audits and size checks.

List Compare Tool

Paste two lists and instantly see common items, items only in list A, items only in list B, with case and whitespace normalization.

Instagram Font Generator

Generate Unicode "fonts" (bold, italic, script, monospace, fraktur) that paste directly into your Instagram bio, name, captions and comments.

Inverted Text Generator

Flip text upside down using Unicode glyphs that look like mirrored letters, for bios, captions and attention-grabbing social posts.

Invisible Character Detector

Detect and remove zero-width spaces, hidden Unicode characters and invisible separators from any text with codepoint and position reporting.

License Generator

Generate the full text of open source licenses with your name and year filled in. Covers MIT, Apache 2.0, GPLv3, BSD-3, MPL-2.0 and CC licenses.

JSON to Go Struct

Convert JSON to Go struct definitions with exported fields, JSON tags, pointer optionals and nested types ready for encoding/json.

JSON to Java Class

Generate Java POJOs from JSON with Jackson or Gson annotations, Lombok support and nested class handling for Spring projects.

JSON to PHP Array

Convert JSON to a PHP array literal using short syntax, associative/indexed arrays and nested structures ready to paste into a .php file.

JSON to Python Dataclass

Generate Python dataclasses from JSON with type hints, Optional fields, nested classes and dataclasses-json or Pydantic support.

JSON to TOML Converter

Convert JSON to TOML with proper table headers, array-of-tables and dotted keys, formatted for Cargo, pyproject.toml and config files.

Link Shortener Decoder

Expand bit.ly, t.co, tinyurl and other short links. See every redirect hop, status code and the final destination before you click.

Keyword Density Checker

Check keyword density and n-gram frequency for SEO content with stop word filtering, stemming and recommended density ranges.

Indexability Checker

Check whether a URL is indexable: robots.txt, meta robots, X-Robots-Tag, canonical signals and HTTP status.

Internal Links Extractor

Extract all internal links from a URL or pasted HTML with anchor text, rel attributes and nofollow status for SEO audits.

Hreflang Checker

Check hreflang annotations in pasted HTML locally for invalid codes, incomplete URLs, duplicates, placement and optional self-reference.

Hreflang Tag Generator

Generate hreflang link tags from a list of multilingual URLs, one line per variant, ready to copy into the head of every page.

Lined Paper Generator

Make printable lined paper free. Choose college, wide or narrow rule, set line spacing in mm, paper size and a margin line, then print or download the SVG.

Instagram Grid Splitter

Split a wide image into a 3×3 Instagram grid, or any number of rows. Tiles keep their order for easy uploading in reverse.

Image Format Converter

Convert images to JPG, PNG or WebP right in your browser, with quality control for the lossy formats and transparency kept in PNG and WebP.

Image Frame Adder

Add a solid frame around any photo with adjustable thickness, a contrasting inner line and live preview, all in your browser.

Image Grayscale Converter

Convert colour images to grayscale in your browser. Free and private, nothing is uploaded.

Image Invert Colors

Invert every RGB channel in an image to produce a negative, useful for creative edits and viewing film scans.

HTML to PDF Converter

Convert basic HTML and inline CSS into an A4, Letter, or Legal raster PDF in your browser, without uploading the source or finished file.

Extract Images from PDF

Extract every image embedded in a PDF file and download them individually or as a single ZIP, preserving their original resolution.

Scan PDF

Turn JPEG, PNG or WebP document photos into one local PDF. Add up to 25 images, choose portrait A4 or US Letter, then download without uploading your files.

Searchable PDF Maker

Turn a scanned PDF into a searchable, selectable document by adding an invisible OCR text layer. Runs entirely in your browser; 7 Latin-script languages.

Redact PDF

Cover sensitive areas and create a fresh flattened PDF in your browser. Every output page is a JPEG image, so original text, links, forms, layers and source metadata are not carried into the copy.

PDF Forms

Fill existing AcroForm PDF fields locally, preserve prefilled values, and download an interactive or explicitly flattened copy.

kW to Amps Converter

Convert kilowatts to amps for DC, single-phase and three-phase circuits. Supply voltage and power factor included for accurate electrical sizing.

Land Transfer Tax Calculator

Estimate land transfer tax on a property purchase using tiered regional rates. Accounts for first-time-buyer rebates and city-level surtaxes.

Law of Cosines Calculator

Solve for the third side of any triangle with c = sqrt(a^2 + b^2 - 2ab·cos C). Enter two sides and the included angle to get side c instantly.

Law of Sines Calculator

Enter angle A, its opposite side a, and angle B. The law of sines calculator returns side b, side c and angle C instantly, with the worked formula.

LBS to KG Converter

Convert pounds to kilograms using the exact 0.45359237 factor. Ideal for medication dosing, shipping labels and international recipe conversion.

LCM Calculator

Find the least common multiple of two or more integers. See prime factorizations and the GCD-based shortcut used in arithmetic proofs.

IP Subnet Calculator

Calculate subnet range, network, broadcast, usable hosts and wildcard mask for any IPv4 CIDR block with full /0 - /32 coverage.

IPv4 to IPv6 Converter

Convert IPv4 addresses to IPv6 in mapped, compatible, 6to4 and embedded formats with the reverse mapping back to IPv4.

HTTP Header Checker

Inspect every HTTP response header returned by a URL to debug caching, CORS, compression and security issues.

HTTP Request Tester

Send HTTP requests with a custom method, headers and body. Inspect the status code, response time, and the full response body and headers.

Domain Age Checker

Check when a domain was first registered and its age in years, months and days using WHOIS data from the registry.

Domain to IP

Resolve any domain name to its IPv4 (A) and IPv6 (AAAA) addresses and copy them into any network tool.

JSON to Excel

Convert JSON to a real Excel XLSX file with typed columns, multiple sheets for nested arrays and date formatting built in.

File Extension Identifier

Find out a file type and its MIME type from a filename or extension, with a reference of common formats and tips for spotting double extensions.

Filename Sanitizer

Clean filenames by stripping unsafe characters, spaces and accents to produce portable names that survive Windows, macOS, Linux and the web.

File Size Analyzer

See any byte count broken down in decimal (KB, MB, GB) and binary (KiB, MiB) units, with the exact figure in bytes.

FLAC to MP3 Converter

Convert lossless FLAC audio to smaller, universally compatible MP3 files for phones, car stereos, players and sharing. Keeps your tags. Upload and download.

Fake Data Generator

Generate realistic fake users: IDs, names, emails, phone numbers and cities as CSV or JSON, ready for testing APIs, dashboards and imports.

JWT Generator

Generate signed JWTs with custom header, payload claims, HMAC or RSA signing, expiry and audience restrictions for testing.

HMAC Generator

Generate HMAC signatures (SHA-256, SHA-384, SHA-512, SHA-1, MD5) from a message and secret key for API auth and webhooks.

Gwei to Ether Converter

Convert an amount in Gwei to Ether (ETH) with up to 18 decimal places. Useful for estimating gas fees and reading transaction data.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes from text, with a copy-ready digest for checksums and comparisons.

File Hash Calculator

Calculate MD5, SHA-1, SHA-256 and SHA-512 hashes of pasted text or file contents to verify downloads and file integrity.

ETH to USD Converter

Convert Ethereum (ETH) to US dollars with a live ETH/USD rate, or enter your own rate. See what any ETH amount is worth in USD.

iMessage Screenshot Generator

Create realistic iMessage conversation screenshots with blue and grey bubbles, timestamps, contact name and iOS status bar.

Instagram Bio Generator

Build an Instagram bio that fits in 150 characters, with optional emojis, line breaks and a single external link. Character count shown live.

Instagram Hashtag Generator

Generate focused Instagram hashtag sets from a topic keyword. Mix of high-volume, mid-tier and niche tags to avoid getting buried.

Fake Zoom Chat Generator

Create fake Zoom meeting chat screenshots with custom participants, messages, timestamps and the Everyone / DM recipient badge.

Facebook Debugger Link Generator

Generate a one-click link to run any URL through the Facebook Sharing Debugger for Open Graph previews and cache refreshes.

Fake Chat Screenshot Generator

Create realistic fake chat screenshots with custom contacts, messages and timestamps for app mockups, memes and tutorials.

Ice Breaker Question Generator

Generate 1 to 10 localized, low-pressure questions from fun, teamwork or gentle-reflection sets privately in your browser.

Haiku Checker

Check whether a poem follows the 5-7-5 haiku structure. Get a live syllable count per line and a pass or fail verdict.

Headcanon Generator

Create curated headcanon prompts for fictional characters and OCs. Choose focus, tone and canon distance; generate locally in your browser tab.

English to Pig Latin

Translate English into Pig Latin and back. Applies the classic consonant-cluster move plus the -ay suffix rule.

Cliche Detector

Paste writing and the detector checks it against a list of common English cliches, reporting how often each phrase appears.

Spelling Bee Generator

Generate a shuffled English spelling word list by level, from Grade 1 to a hard Bee round. Free, built-in word lists for classroom or home practice.

Letter Boxed Solver

Solve the NYT Letter Boxed puzzle. Enter the four sides of the box and the solver lists valid words and two-word solutions covering every letter.

Letter Template Generator

Generate formatted letter templates ready to download. Covers formal business letters, cover letters, resignation notices and thank-you follow-ups.

Invoice Generator

Create professional PDF invoices with line items, tax breakdown, discounts, currency, payment terms and your logo.

Ingredient Substitution Finder

Find reliable kitchen substitutes for any ingredient you are missing, with correct ratios and notes on what changes in the recipe.

Grocery List Maker

Build a grocery list sorted into store sections. Type or paste your items, get them grouped automatically, and print or share the finished list from any device.

Habit Tracker

Track up to 12 habits in a private monthly grid. Set daily, weekday, weekend or custom schedules, review streaks, then print or export CSV.