Softonic Tools

Retirement Calculator

Project your retirement balance from contributions, returns and inflation. See how long savings last based on target spending and Social Security assumptions.

Pipe Reynolds Number Calculator

Calculate Re = ρvD/µ in SI units and classify internal flow in a straight circular pipe using the 2300 and 4000 reference thresholds.

RGB to CMYK Converter

Convert RGB colours to CMYK ink percentages with the standard formula. Instant preview swatch and C/M/Y/K values. A mathematical approximation, not a colour-managed print conversion.

RGB to HEX Converter

Convert rgb() values to the #rrggbb hexadecimal form used in CSS and design tools. Handles 3-digit shorthand and rgba with alpha.

RGB to HSL Converter

Convert RGB to HSL (hue, saturation, lightness) for easier colour manipulation in CSS. Adjust lightness or saturation without distorting hue.

RGB to HSV Converter

Convert RGB to HSV (hue, saturation, value). Used by design-tool colour pickers, image-processing libraries and any workflow that reasons about "pure hue plus white/black".

Rhyme Finder

Find rhymes for an English word from a built-in word list: perfect matches (a longer shared ending) and near matches (a shorter shared ending). A quick brainstorming aid for lyrics and light verse.

Rice Cups to Grams Converter

Convert US cups of dry rice to grams by variety: basmati, jasmine, sushi, arborio, brown and more each have their own density, with ounces shown alongside.

Ring Size Converter

Convert ring sizes between US numeric, UK alphabetic, EU circumference and inner diameter in millimetres. Includes a printable ring sizer template.

Required Minimum Distribution (RMD) Calculator

Calculate a US IRA required minimum distribution from the prior December 31 balance using the current IRS lifetime table and divisor.

Robots.txt Checker

Paste your robots.txt rules and a URL path to test whether that path is allowed or blocked. Reads the Allow and Disallow lines and reports the matching rule.

Robots.txt Generator

Generate a valid robots.txt file: set the user-agent, list Disallow and Allow paths, add a Crawl-delay and declare your sitemap, then copy the result.

ROI Calculator

Compute simple ROI, annualised ROI and IRR-adjusted return. Compare investments of different durations on an equal footing.

Roman Numeral Converter

Convert between Arabic numerals and Roman (MCMXCIV). Supports the subtractive notation (IV, IX, XL, XC) and values from 1 to 3,999,999 with vinculum.

Roofing Calculator

Estimate the surface area of a simple symmetric gable roof, roofing squares and bundles from footprint, pitch and waste.

Roof Pitch Calculator

Convert rise and run into pitch, angle, grade and slope factor. Add a full span to estimate a common-rafter slope length for a symmetric gable roof.

ROT13 Encoder

ROT13 encodes text by shifting each letter 13 places in the alphabet. A becomes N, B becomes O, and the operation is its own inverse.

Rotate GIF

Rotate an animated GIF by 90, 180 or 270 degrees. Preserves every frame, timing and transparency. Runs entirely in the browser.

Rotate JPG

Rotate a JPG by 90, 180 or 270 degrees, or drag the slider to any angle. Pick a background colour for the exposed corners and set the output quality. Runs entirely in the browser.

Rotate PNG

Rotate PNG images 90, 180 or 270 degrees. PNG is lossless, so rotating and saving never degrades quality. Transparency is preserved.

ROT13 Encoder

ROT13 encodes text by shifting each letter 13 places in the alphabet. A becomes N, B becomes O, and the operation is its own inverse.

Remove HTML Tags

Paste HTML and get the plain text back with every tag removed. Server-side stripping with before, after and removed character counts.

Remove Line Numbers

Paste numbered text from a code snippet, book or PDF and the tool removes the leading number and its separator (a period, colon or tab) from every line.

Random Prompt Generator

Generate random creative prompts for writing, drawing or journaling. Pick a type, choose how many to show, and shuffle for a fresh set. Prompts are in English.

Random Question Generator

Generate random conversation questions for icebreakers, road trips, dinners or journaling. Choose how many to show and shuffle for a fresh set. Questions are in English.

Random Quote Generator

Get a random inspirational quote from a hand-picked set of famous quotations, each shown with the author it is attributed to. Click for another anytime.

RGB to CMYK Converter

Convert RGB colours to CMYK ink percentages with the standard formula. Instant preview swatch and C/M/Y/K values. A mathematical approximation, not a colour-managed print conversion.

RGB to HEX Converter

Convert rgb() values to the #rrggbb hexadecimal form used in CSS and design tools. Handles 3-digit shorthand and rgba with alpha.

RGB to HSL Converter

Convert RGB to HSL (hue, saturation, lightness) for easier colour manipulation in CSS. Adjust lightness or saturation without distorting hue.

RGB to HSV Converter

Convert RGB to HSV (hue, saturation, value). Used by design-tool colour pickers, image-processing libraries and any workflow that reasons about "pure hue plus white/black".

Robots.txt Generator

Generate a valid robots.txt file: set the user-agent, list Disallow and Allow paths, add a Crawl-delay and declare your sitemap, then copy the result.

Regex Generator from Sample

Paste one example string and get a starting regular expression: runs of digits, uppercase and lowercase letters become sized character classes, and other characters stay as escaped literals.

Robots.txt Checker

Paste your robots.txt rules and a URL path to test whether that path is allowed or blocked. Reads the Allow and Disallow lines and reports the matching rule.

Redirect Checker

Enter a URL and see the full redirect chain: each 301, 302, 303, 307 or 308 hop with its status code, Location header and the final landing URL.

Page Speed Insights

Enter any URL and open a free speed audit in Google PageSpeed Insights, GTmetrix or WebPageTest to see Core Web Vitals and Lighthouse scores.

Page Word Count Checker

Paste a page's HTML source and count the visible words, characters and reading time after tags are stripped, for SEO audits and benchmarking.

Open Graph Checker

Paste your page HTML and see instantly which Open Graph and Twitter Card tags are present, which required ones are missing, and the exact value of each.

Open Graph Preview

Type your title, description, image and URL and see a live Facebook and X (Twitter) share card update as you edit, so you can catch a broken preview before you publish.

Rotate GIF

Rotate an animated GIF by 90, 180 or 270 degrees. Preserves every frame, timing and transparency. Runs entirely in the browser.

Rotate JPG

Rotate a JPG by 90, 180 or 270 degrees, or drag the slider to any angle. Pick a background colour for the exposed corners and set the output quality. Runs entirely in the browser.

Rotate PNG

Rotate PNG images 90, 180 or 270 degrees. PNG is lossless, so rotating and saving never degrades quality. Transparency is preserved.

Resize GIF

Resize animated GIFs online, free. Set new pixel dimensions, keep the aspect ratio, and download a new GIF with every frame rescaled. Runs entirely in your browser, nothing is uploaded.

Resize JPG

Resize JPG images online, free. Set a new width and height in pixels, adjust the JPEG quality, preview the result and download the smaller file. Runs entirely in your browser, nothing is uploaded.

Resize PNG

Resize PNG images right in your browser. Set a new width and height in pixels, lock the aspect ratio, and keep the transparent background. Nothing is uploaded.

Repair PDF

Upload a PDF that will not open cleanly. The tool re-reads it tolerantly and writes a fresh, valid file with a rebuilt structure. Everything runs in your browser.

PowerPoint to PDF Converter

Upload a PPT or PPTX presentation up to 200 MB and convert it to a static PDF on our servers. Download the result from a private results page.

PDF Add Page Numbers

Add page numbers to any PDF: choose one of six positions, a starting number, the font size and either plain numbers or "1 / N". Runs entirely in your browser.

PDF Add Watermark

Add a diagonal text watermark like CONFIDENTIAL or DRAFT to every page of a PDF. Set the text, size, opacity and angle. Runs entirely in your browser.

PDF Crop

Crop the margins of every page in a PDF. Set how many points to trim from the top, right, bottom and left. Runs in your browser.

PDF Extract Pages

Extract selected pages from a PDF into a new document, right in your browser, so you can share only the parts you need.

Retirement Calculator

Project your retirement balance from contributions, returns and inflation. See how long savings last based on target spending and Social Security assumptions.

Pipe Reynolds Number Calculator

Calculate Re = ρvD/µ in SI units and classify internal flow in a straight circular pipe using the 2300 and 4000 reference thresholds.

Rice Cups to Grams Converter

Convert US cups of dry rice to grams by variety: basmati, jasmine, sushi, arborio, brown and more each have their own density, with ounces shown alongside.

Ring Size Converter

Convert ring sizes between US numeric, UK alphabetic, EU circumference and inner diameter in millimetres. Includes a printable ring sizer template.

Required Minimum Distribution (RMD) Calculator

Calculate a US IRA required minimum distribution from the prior December 31 balance using the current IRS lifetime table and divisor.

ROI Calculator

Compute simple ROI, annualised ROI and IRR-adjusted return. Compare investments of different durations on an equal footing.

TCP Port Checker

Attempt a server-side TCP connection to one port on a public internet host. Understand the five-second timeout and what the result can prove.

TCP Port Range Scanner

Test a consecutive TCP port range on one public internet host. The server reports only ports that accept a connection.

Ping Tool

Run four server-side TCP connection attempts to a public host on port 80. See each connect time, successful-attempt statistics and failed-attempt rate.

Open Port Scanner

Scan a fixed list of common TCP ports on a public host to see which ones are open and which services are reachable. A quick, basic check, not a full scanner.

MX Record Lookup

Look up MX records for any domain to see the mail servers handling its email, their priorities, and spot misconfigurations.

MIME Type Detector

Detect the real MIME type of a file by reading its magic bytes. Identifies images, video, PDF, zip, office documents and more.

ODT to DOCX Converter

Convert OpenDocument Text (ODT) files to Word DOCX so anyone on Microsoft Office can open and edit them. Keep your text, headings, lists and basic formatting intact.

OGG to MP3 Converter

Convert OGG (Vorbis) audio files to MP3 for broad compatibility with phones, cars, music apps and devices that do not support the OGG format.

MOV to MP4 Converter

Convert QuickTime MOV videos to MP4 for smooth playback on any device, easy sharing and reliable web uploads. Upload a .mov file and download a compatible .mp4.

MP3 to WAV Converter

Convert MP3 audio to uncompressed WAV for editing, mixing and production tools that prefer PCM. Upload an .mp3 file and download a standard .wav.

MP4 to GIF Converter

Convert short MP4 video clips into animated GIFs for chats, posts, docs and bug reports. Upload an .mp4 and download a silent, auto-looping .gif.

MP4 to MP3 Converter

Pull the audio track out of an MP4 video and save it as an MP3. Great for music videos, podcasts, lectures and voice clips you want to listen to anywhere.

Random API Key Generator

Generate 8–128 character API keys on the server in hex, URL-safe base64 or alphanumeric format, or create a UUIDv4.

Polybius Cipher Encoder

Encode Latin letters as Polybius coordinates or decode space-separated pairs with the fixed 5×5 I/J grid.

PGP Key Generator

Generate an ASCII-armored OpenPGP keypair and revocation certificate with Curve25519, RSA 2048 or RSA 4096.

Passphrase Generator

Generate a memorable passphrase from random common words, with an adjustable word count, separator, capitalization and an optional appended number.

Password Strength Checker

Check password strength in your browser: length, character variety, entropy in bits and a rough crack-time estimate. Nothing is uploaded.

Number to Letter Cipher

Convert numbers to letters and back using the A=1, B=2 cipher (A1Z26) for puzzles, riddles and escape room clues.

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.

Rhyme Finder

Find rhymes for an English word from a built-in word list: perfect matches (a longer shared ending) and near matches (a shorter shared ending). A quick brainstorming aid for lyrics and light verse.

Random Sentence Generator

Generate random English sentences in one click. Choose how many you want and get short, grammatical filler sentences for testing, prompts or placeholders.

Readability Analyzer

Paste your English text and see Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog and SMOG scores side by side.

Readability Score Calculator

Score your English text on Flesch Reading Ease, Flesch-Kincaid Grade Level and Gunning Fog. Spot passages that are too dense for your audience.

Reading Time Estimator

Estimate reading time for any text at a chosen words-per-minute rate. Adjust for audience and content complexity. Shows minutes, seconds and words.

Random Paragraph Generator

Generate 1 to 20 paragraphs with 1 to 12 complete sentences each, using a reviewed sentence bank localized for the page language.

Resume Builder

Fill in your name, headline, summary, skills and experience and get a clean, single-column plain-text resume you can copy. Section headings are in English.

Receipt Generator

Build a clean sales receipt with seller and buyer details, line items, tax and totals. Preview it live and download it as a PNG image, right from your browser.

Recipe Scaler

Paste a recipe and change the serving count. The tool rescales every ingredient, keeping cup, tablespoon and gram units intact with sensible rounding.

Random MLB Team Generator

Draw unique team names from a fixed list of the 30 current MLB clubs, with All, AL or NL filters.

Random NBA Team Generator

Select 1 to 30 unique NBA team names from all teams, or up to 15 from the Eastern or Western Conference. Team names stay official.

Random NFL Team Generator

Select 1 to 32 unique NFL team names from all teams, or up to 16 from the AFC or NFC. Team names stay official.