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Fast calculators, converters, formatters, generators, and planning utilities for everyday work.
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Mortgage Payment CalculatorEstimate principal, interest, taxes, insurance, and total monthly payment.Loan Payment CalculatorCalculate monthly payments and total interest for a fixed loan.Compound Interest CalculatorProject investment growth with recurring contributions.Savings Goal CalculatorSee how long it takes to hit a savings target.Debt Payoff CalculatorEstimate payoff time and interest for a debt balance.Hourly to Salary CalculatorConvert an hourly wage into weekly, monthly, and annual pay.Salary to Hourly CalculatorConvert annual salary into an equivalent hourly rate.Profit Margin CalculatorCalculate gross profit, margin, and markup.Sales Tax CalculatorAdd sales tax to a price or split out tax from a total.Tip Split CalculatorCalculate tip, total, and per-person split.JSON FormatterFormat JSON with readable indentation.JSON MinifierRemove whitespace from valid JSON.Base64 Encoder / DecoderEncode or decode Base64 text.URL Encoder / DecoderEncode or decode URL-safe strings.Slug GeneratorTurn titles into clean URL slugs.Case ConverterConvert text between common casing styles.Word and Character CounterCount words, characters, sentences, and paragraphs.Reading Time CalculatorEstimate reading time from pasted text.CSV to JSON ConverterConvert simple CSV text into JSON records.Unix Timestamp ConverterConvert Unix timestamps into readable dates.ROI CalculatorCalculate return on investment from gain and cost.ROAS CalculatorCalculate return on ad spend.CAC CalculatorCalculate customer acquisition cost.LTV CalculatorEstimate customer lifetime value.Conversion Rate CalculatorCalculate conversion rate from visitors and conversions.Churn Rate CalculatorCalculate customer churn over a period.MRR CalculatorCalculate monthly recurring revenue.CPM CalculatorCalculate cost per thousand impressions.CPC CalculatorCalculate cost per click.Break-even CalculatorFind how many units you need to sell to break even.AI Token EstimatorEstimate token count from pasted text.LLM Cost CalculatorEstimate AI model cost from input/output token usage.Context Window CalculatorCheck how much LLM context remains for a response.Prompt Brief GeneratorTurn a task into a structured AI prompt brief.Image Prompt BuilderBuild a structured prompt for image generation.Automation ROI CalculatorEstimate payback from automating repeated work.Embedding Cost CalculatorEstimate vector embedding cost for a document set.Batch Inference Cost CalculatorEstimate cost for bulk AI API jobs.Transcript ChunkerSplit long transcripts into approximate token chunks.System Prompt SkeletonGenerate a structured system prompt starter.Crypto Profit CalculatorCalculate profit, ROI, and exit value for a token trade.Crypto DCA CalculatorEstimate tokens accumulated by dollar-cost averaging.Market Cap CalculatorCalculate token market cap from price and circulating supply.FDV CalculatorCalculate fully diluted valuation.Staking Rewards CalculatorEstimate staking rewards over time.APR / APY ConverterConvert APR to APY or APY to APR.Impermanent Loss CalculatorEstimate LP impermanent loss from a token price change.Slippage CalculatorCalculate minimum received after slippage tolerance.Liquidation Price CalculatorEstimate liquidation price for a leveraged position.Vesting Schedule CalculatorEstimate vested and locked token amounts.Refinance Break-even CalculatorEstimate how long it takes refinancing savings to cover closing costs.Rent vs Buy CalculatorCompare monthly renting cost against estimated home ownership cost.Emergency Fund CalculatorCalculate an emergency fund target and savings timeline.Retirement Withdrawal CalculatorEstimate first-year withdrawal from a retirement portfolio.Credit Card Minimum Payment CalculatorEstimate payoff time when making minimum credit card payments.Auto Loan Payment CalculatorEstimate monthly car payments and total interest.Down Payment CalculatorCalculate down payment amount, loan amount, and savings gap.Biweekly Mortgage CalculatorEstimate payoff acceleration from biweekly mortgage payments.Debt Snowball CalculatorEstimate payoff time for three debts using a snowball payment.Savings Rate CalculatorCalculate personal savings rate from income, taxes, and spending.Regex Escape ToolEscape literal text for safe use inside a regular expression.REM PX ConverterConvert between rem and px values.Aspect Ratio CalculatorScale widths and heights while preserving aspect ratio.CSS Clamp CalculatorGenerate a fluid CSS clamp expression.Text Diff Size CalculatorCompare character and word counts between two text blocks.UTM URL BuilderBuild a URL with common UTM campaign parameters.JWT Expiry CalculatorCalculate JWT expiration time from issued-at and TTL values.API Pagination CalculatorEstimate page count and request batches for paginated APIs.Cache Hit Rate CalculatorCalculate cache hit rate, miss rate, and origin load.Slug Length CheckerGenerate a slug and check its length.Gross Profit CalculatorCalculate gross profit, gross margin, and markup.Net Profit CalculatorEstimate net profit after operating expenses and taxes.Payback Period CalculatorCalculate how long an investment takes to pay back.Burn Rate Runway CalculatorCalculate startup runway from cash and monthly burn.Pricing Markup CalculatorPrice a product from unit cost and target margin.Inventory Turnover CalculatorCalculate inventory turnover and days on hand.ARPU CalculatorCalculate average revenue per user.Activation Rate CalculatorCalculate signup-to-activation conversion.Support Load CalculatorEstimate support tickets and agent capacity.Ad Budget Pacing CalculatorCheck whether ad spend is ahead or behind plan.Tokens per Dollar CalculatorEstimate how many tokens fit in a model budget.Prompt Token Budget CalculatorReserve output space inside a context window.Dataset Token EstimatorEstimate dataset tokens from documents and average words.Fine-tuning Cost CalculatorEstimate fine-tuning training cost from dataset size and epochs.Vector Storage CalculatorEstimate vector embedding storage size.RAG Chunk Count CalculatorEstimate chunks created for a RAG knowledge base.AI Latency Throughput CalculatorEstimate request throughput from latency and concurrency.Agent Step Cost CalculatorEstimate cost per agent run from step count and token usage.Image Generation Cost CalculatorEstimate image generation batch cost.Transcription Cost CalculatorEstimate audio transcription cost.Gas Fee CalculatorEstimate transaction gas cost in native token and USD.Token Allocation CalculatorCalculate allocation tokens and value from supply share.Airdrop Value CalculatorEstimate airdrop value after claim fees and taxes.Liquidity Pool Share CalculatorCalculate pool ownership share and claim on reserves.Bridge Fee CalculatorEstimate bridge fees and received amount.DCA Average Price CalculatorCalculate average buy price across recurring crypto purchases.Token Burn Impact CalculatorEstimate supply reduction and implied price impact from a burn.Funding Rate Cost CalculatorEstimate perpetual funding cost over time.Staking Tax Lot CalculatorEstimate staking reward income basis.NFT Royalty CalculatorCalculate creator royalties from NFT sales volume.Markdown Table GeneratorTurn comma-separated headers and rows into a Markdown table.Privacy Policy StarterGenerate a plain-English privacy policy starter.Meta Description CheckerCheck a meta description for length and search-result clarity.Cold Email GeneratorDraft a concise cold email from offer and audience details.Meeting Notes to Action ItemsExtract likely action items from pasted meeting notes.JSON Schema GeneratorCreate a simple JSON Schema from sample JSON.Robots.txt GeneratorGenerate a basic robots.txt file.Content Brief GeneratorBuild a structured brief for a blog post or guide.Invoice Template GeneratorGenerate a plain invoice template from client and line item details.Launch Checklist GeneratorGenerate a practical launch checklist for a product or feature.SQL FormatterFormat simple SQL by placing common clauses on separate lines..env Example GeneratorGenerate a safe .env.example from variable names.FAQ Schema GeneratorGenerate FAQPage JSON-LD from question and answer pairs.Proposal Quote GeneratorDraft a lightweight proposal and quote.Support Ticket ClassifierClassify a support ticket by likely type and urgency.HTML Entity Encoder / DecoderEncode or decode common HTML entities.Canonical URL CheckerCheck a canonical URL for common formatting problems.Social Snippet GeneratorTurn one idea into several short social posts.Refund Policy StarterDraft a clear refund policy starter.Daily Plan GeneratorTurn priorities into a focused daily execution plan.Regex Tester / ExplainerTest a regular expression against sample text and explain common tokens.Open Graph Tag CheckerCheck pasted HTML for common Open Graph tags.Newsletter Outline GeneratorCreate a newsletter outline from a topic and links.Incident Postmortem TemplateGenerate an incident postmortem template.Kanban CSV to BoardConvert task CSV into a Markdown kanban board.Campaign Angle GeneratorTurn an offer and audience into testable marketing angles.Ad Copy Variant GeneratorCreate short ad copy variants for one offer.Landing Page Copy CheckerCheck a landing page message for clarity and conversion gaps.Persona Pain Point MapperMap an audience to pains, triggers, objections, and offers.Campaign Calendar GeneratorBuild a lightweight campaign calendar from goals and channels.A/B Test Hypothesis GeneratorTurn an observation into an A/B test hypothesis.Customer Review Prompt GeneratorCreate a review request prompt for recent customers.Referral Offer PlannerPlan a referral offer and promotion note.Blog Outline GeneratorGenerate a structured outline for a practical blog post.YouTube Description GeneratorDraft a YouTube description from a video topic and CTA.Podcast Show Notes GeneratorTurn episode notes into show notes.Transcript Summary GeneratorSummarize a transcript into key points and follow-ups.Content Refresh ChecklistCreate a checklist for updating old content.Hook Variant GeneratorCreate opening hooks for social, email, or article content.Content Repurpose PlannerTurn one source asset into a repurposing plan.Weekly Priority PlannerConvert goals into a focused weekly plan.SOP Outline GeneratorCreate an SOP outline from a recurring task.Decision Matrix GeneratorCreate a simple decision matrix for competing options.Retrospective Prompt GeneratorGenerate prompts for a project retrospective.Task Breakdown GeneratorBreak a project goal into ordered tasks.Standup Update GeneratorTurn notes into a crisp standup update.Title Tag GeneratorGenerate concise SEO title tag options.Schema Markup PlannerPlan structured data for a page type.Internal Link Anchor GeneratorGenerate internal link anchors for related pages.Sitemap Entry GeneratorCreate sitemap URL entries from paths.Crawl Budget ChecklistBuild a crawl-budget review checklist.Terms Clause StarterDraft starter clauses for product terms.Contract Review ChecklistCreate a practical checklist for reviewing a contract.Vendor Risk ChecklistGenerate a vendor review checklist.Data Retention Policy StarterDraft a simple data retention policy starter.Support SLA GeneratorDraft support SLA response targets.Image Format ConverterUpload an image and convert it to JPG, PNG, WebP, AVIF, or TIFF.Image Resize / Compress ConverterUpload an image and download a resized, compressed web-ready version.PDF to Images ConverterConvert PDF pages into PNG, JPG, or WebP images when PDF tooling is installed.Images to PDF ConverterUpload images and download a combined PDF.Video Format ConverterUpload video and download MP4, MOV, WebM, MKV, or GIF output.Audio Format ConverterUpload audio and download MP3, WAV, AAC, FLAC, or OGG output.Document to PDF ConverterConvert office documents when LibreOffice is installed on the server.Spreadsheet / CSV ConverterUpload CSV, TSV, or JSON data and convert it to another tabular format.Archive Format ConverterUpload files and download a ZIP, TAR.GZ, or TAR.BZ2 archive.Ebook Format ConverterConvert ebooks when Calibre is installed on the server.SVG Raster Export ConverterUpload SVG artwork and download PNG, PDF, or plain SVG output.Markdown to HTML ConverterConvert basic Markdown into HTML.
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Mortgage Payment CalculatorEstimate principal, interest, taxes, insurance, and total monthly payment.6 inputsImage Format ConverterUpload an image and convert it to JPG, PNG, WebP, AVIF, or TIFF.4 inputsJSON FormatterFormat JSON with readable indentation.2 inputsROI CalculatorCalculate return on investment from gain and cost.2 inputsAI Token EstimatorEstimate token count from pasted text.2 inputsPDF to Images ConverterConvert PDF pages into PNG, JPG, or WebP images when PDF tooling is installed.4 inputsCold Email GeneratorDraft a concise cold email from offer and audience details.4 inputsContent Brief GeneratorBuild a structured brief for a blog post or guide.4 inputs
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Useful tools grouped by job.
Finance20 tools
Everyday money calculators for loans, savings, taxes, income, and payoff planning.
Developer26 toolsFast formatters, encoders, counters, and converters for common development chores.
Business20 toolsOperational calculators for acquisition, revenue, pricing, ads, and unit economics.
AI20 toolsPrompt, token, context, and cost tools for people building with AI systems.
Crypto20 toolsOnchain math for profit, market cap, staking, vesting, slippage, and risk checks.
Marketing10 toolsCampaign builders, copy helpers, tracking utilities, and acquisition planning tools.
Content10 toolsGenerators and transformers for briefs, posts, transcripts, FAQs, and publishing workflows.
Legal / Ops10 toolsOperational templates for policies, agreements, invoices, checklists, and internal process docs.
SEO / Web10 toolsWebpage metadata, schema, sitemap, robots, accessibility, and launch-check utilities.
Files12 toolsCopy-ready conversion commands and workflow builders for images, PDFs, documents, video, audio, archives, ebooks, and web files.
Productivity10 toolsMeeting, planning, ticket, checklist, and workflow utilities for daily execution.
For developers
Use the same tools from your own app.
View API docs ->POST /api/tools/mortgage-payment-calculator
{
"inputs": {
"homePrice": "425000",
"downPayment": "85000"
}
}