The Professional’s
Handbook of Tools
248 calculators, converters and generators — tax, finance, PDF, images, code. Every entry runs entirely in your browser and asks for nothing in return.
Table of Contents
14 chapters · 248 entriesWorkflows for every situation
Pick a workflow that matches your goal — tools chain together from start to finish, all in your browser.
Freelance & Tax
Invoice, calculate tax, estimate quarterly payments, and plan retirement.
Job Search & Career
Rewrite your resume for ATS, compare offers, prepare for interviews — all locally.
Start a Business
Form an LLC, generate legal pages, calculate break-even, set up invoicing.
Resell & Side Hustle
Calculate profit margins, check sales tax nexus, compare platforms.
Knowledge Worker
Summarize meetings, draft emails, analyze contracts, generate reports — all locally.
Family & Household
Manage family schedules, track subscriptions, plan a move, organize digital estate.
Create & Publish
Resize images, generate captions, edit videos, optimize YouTube SEO.
Developer Tools
Format JSON, decode JWT, generate UUIDs, test regex, convert encodings.
Open a chapter
14 chapters · 248 tools — pick one to see its full toolkit.
Photo & ID
Print-ready ID photos, passport, visa, photo restoration — all 100% private in your browser.
Image Tools
Professional free image tools — resize, watermark, format conversion, ICO favicon, background blur, WebP converter, EXIF viewer, social media resizer. No upload, 100% private.
PDF Tools
Professional free PDF tools — merge, split, compress, unlock, sign, annotate, form fill, text extract, PDF to Word, PDF to Excel, PDF to image. All 100% browser-based, no upload.
Taxes
Professional free tax calculators — sales tax by state, self-employment tax, capital gains, 1099-K, freelancer tax, W-4 withholding, payroll tax, multi-state allocation. All 2026 IRS rates.
Personal Finance
Professional free financial calculators — mortgage, retirement, investments, compound interest, loans, insurance, crypto profit, currency converter, medical bill analyzer. Plan your financial future.
Business & Legal
Professional free business tools — LLC cost comparison, invoice generator, break-even analysis, payment processor comparison, GDPR/privacy generators, immigration and legal utilities.
Family & Household
Free household management tools — family schedules, subscription tracking, moving cost calculator, moving checklist, address change letters, digital estate organizer, event coordinator, childcare costs. Manage family life privately.
Health & Wellness
Free health and fitness calculators — BMI, body fat, BMR, daily calories, ovulation and pregnancy dates, insurance deductibles, HSA/FSA, GLP-1 costs. Private, browser-based, and never uploaded.
AI Tools
Lightweight AI tools that run in your browser — resume rewriter, email writer, paraphraser, meeting summary, PDF reader, task prioritizer, and more. No signup, no token cost, 100% local.
Creator & Video
YouTube creators, podcasters, video editors, social media managers — boost reach, SEO, and engagement with AI captions and video tools.
Developer
JSON, Base64, UUID, regex, JWT, QR — utilities that respect your privacy.
Art & Music
Professional free creative tools — pixel art editor, photo-to-oil-painting converter, 3D desktop pet maker, beat synthesizer & loop composer. Create art and music in your browser.
Career & Jobs
Free career tools — AI cover letter writer, interview prep coach, salary negotiation calculator, job offer comparison. Land your next job faster.
Immigration
Free immigration tools — USCIS processing time estimator, visa fee calculator, green card priority date tracker. Plan your immigration journey.
Foreword
Why this handbook existsThere is no upload button — because there is no server.
Your files & data never leave your browser. Computation happens in your browser’s own sandbox — no accounts, no analytics on your inputs, nothing to breach. Audit it yourself with the network tab: open any tool and watch it make zero requests.
No loading, no signup — answers in milliseconds.
Calculations finish in milliseconds, not minutes. Every tool opens directly in your browser and works offline once loaded — no queue, no processing screen, no waiting.
Free to use. Pro if you push it.
Every one of the 248 entries in this handbook is fully functional the moment you open it — no signup, no watermarks. The free tier allows 5 downloads or saves per day; the optional Pro plan ($7/mo or $59/yr) lifts that and adds batch runs, unlimited downloads, white-label exports and an ad-free experience.
Built for every state, every country.
Tax brackets for all 50 US states, business tools for global freelancers, and developer utilities for everyone — wherever you file, invoice, or ship from.
Bookmark it once.
Consult it whenever you need it.
Free, account-free and local — the way a handbook should be.