Quickly check duration/bitrate and prep audio or video before sending it to clients or editors.
Detect the delimiter, find broken rows, and sanity-check CSV structure without uploading anything.
Parse campaign URLs, label parameters by platform, and export a neat CSV for QA and reporting.
Make links look natural and privacy-friendly by removing tracking parameters before sharing.
Pick a timer based on your workflow: focus blocks, intervals, EMOM/AMRAP, or fixed HIIT sessions.
Tune by pitch, find tempo by tapping, and practice with a clean click track.
Minimal timers for focus and training.
Just an hourglass. 3, 5, 15, 30, 60 min.
25 min work / 5 min break productivity timer.
Every Minute On the Minute timer with beep cues each minute for conditioning rounds.
As Many Rounds As Possible timer with countdown and finish beep. Set minutes 1-90.
Simple Work/Rest loop. No rounds limit.
4-minute Tabata workout (20s/10s). No setup.
10-minute HIIT workout (30s/30s). No setup.
Quickly calculate dates and times.
Quick converters for daily life.
Manipulate documents in your browser.
Process audio and video files locally.
Preview how one image scales on smartphone and tablet viewports.
Create a video from an image and audio file (max 5 min).
Check audio & video length instantly. No upload.
Check codec, bitrate, sample rate, resolution, and FPS locally.
Cut audio locally. No upload. No effects.
Extract audio from video locally. No upload.
Apply uniform mosaic/pixelation to images. Batch process up to 10 files.
Simple tools for musicians and audio.
Clean, inspect, and transform text and data.
Remove utm_source=chatgpt.com and other AI tracking params.
Convert file sizes between KB, MB, GB, and more instantly.
Convert cooking times between 500W, 600W, 800W, and 1500W microwaves.
Clean up AI output for Slack, Teams, and email.
Accept or reject edits to finalize a revised document.
Compare two texts with line/word/char diff modes. Side-by-side or unified view.
Encode text or files to Base64, or decode Base64 back to text.
Remove tracking parameters from shared links.
Extract tracking parameters from ad URLs to CSV.
Convert Markdown tables into PNG/JPG images or CSV for spreadsheets. Preview before download.
Export Markdown with footnotes, themes, and fonts from a local live preview.
Preview SVG and download it instantly as SVG, PNG, or JPG.
Count rows and columns in CSV data instantly.
Detect the delimiter (comma, tab, semicolon, pipe) in CSV data.
Convert schedule CSV files into calendar .ics files with validation.
Batch-convert CSV/TSV with delimiter/newline/BOM presets and ZIP output.
Open a local SQLite DB, run SELECT queries, and export CSV/JSON.
Find rows with incorrect column counts.
Validate JSON syntax and inspect structure details.
Generate OpenCode config and CLI commands for DeepSeek V4 Flash.
Investment and retirement planning calculators.
Calculate future value with monthly contributions and compound interest.
Estimate years to double your money or rate needed. Quick mental math.
Project nominal and inflation-adjusted real returns side by side.
Compare dollar-cost averaging vs lump sum investing. See which wins.
Monte Carlo simulation of retirement withdrawals. See success rate.
Calculate monthly payments, total interest, and amortization schedule.
See how many years to reach your savings target with regular contributions.
Calculate sale price and savings from any percentage discount instantly.
Auspicious day calendar based on traditional Japanese almanac.
Small utilities for cleaning Japanese text.
Remove newlines/spaces/tabs and view diffs (browser-only).
SaaS風トップからエディタ本体へ。縦書きプレビュー付きで、入力をブラウザ内に自動保存できます。
作業と移動時間を合計して、終了時刻（順算）や必要な開始時刻（逆算）を計算します。
ドント方式・Sainte-Lague法・Hare余り方式の議席配分を並列比較できます。
9ブロックで事業計画を整理し、ブラウザ保存・JSON保存ができます。
UTM parameter tools and QR code generator in Japanese.
For tools that accept files, processing happens entirely in your browser — no uploads, no accounts. (Ads and basic analytics may still load to keep the service running.)