Small tools, made carefully.
Useful utilities for developers and curious people. No accounts, no tracking, and a privacy note on every tool.
Markdown Viewer
Paste or open Markdown (.md) for a live preview with task lists, code highlighting, and export. Free, private, no account.
Image shrink
Compress, resize, crop, caption, and convert images with EXIF stripped.
Screenshot redactor
Blur, pixelate, or black-bar secrets in screenshots before sharing.
PDF lite
Preview, merge, split, strip metadata, and extract text — files stay local.
CSV inspector
Preview, filter, and convert CSV locally — export JSON, Markdown, or SQL.
JSON formatter
Format, validate, and minify JSON with clear error messages.
FIRE planner
Estimate your FI number, corpus gap, and required SIP with charts.
SIP calculator
Project SIP growth with step-ups and lump sums — invested vs gains chart.
SWP calculator
Test whether a corpus survives monthly withdrawals, with depletion warning.
EMI calculator
Loan EMI plus exactly what a lump-sum prepayment saves.
Rent vs buy
Compare renting against buying the same home, with charts.
Salary take-home
CTC to monthly in-hand with old vs new regime tax, FY 2026-27.
Regex tester
Test patterns safely with escaped match previews.
JSON to Go
Turn nested JSON examples into readable Go structs.
Go to sample JSON
Turn simple Go structs into example JSON payloads.
Base64 workbench
Encode and decode UTF-8 text without sending it anywhere.
Epoch converter
Translate timestamps, ISO dates, and local time at a glance.
UUID generator
Generate v4 UUIDs with the browser crypto API.
QR generator
Generate QR codes locally with custom colors and sizes.
Cron Visualizer
Plain-language schedules, upcoming runs, and a shareable calendar view.
Invoice builder
Create a clean, print-ready invoice without an account.
PlantUML editor
Write and preview PlantUML diagrams. Export as SVG.
Regex explainer
AI walkthrough of any regex: what it matches and where it bites.
Roast my code
Witty but honest code review that points at real problems.