LocalToolbox : Offline Tools

Local Toolbox is a privacy-first, fully offline utility app with 218 practical tools. No account, no internet and no file uploads; no ads, subscriptions or in-app purchases. Pay once and use it long-term.

Why people choose it:
- Privacy: ID photos, contracts, payslips, engineering drawings and family photos are processed only on the device. They are not uploaded, do not pass through an account and are not sent to third-party services.
- Reviewable results: unit conversions, dates, hashes, PDF operations and engineering formulas follow standard rules instead of relying on generated answers.
- Open and use: no sign-up, no prompt and no generation wait. Choose a tool, enter the data and get the result.
- Works offline: stay usable in basements, on construction sites, on planes and on weak networks.
- One-time purchase: pay once and keep using it without recurring fees.
- Professional scenarios: engineering, HR, legal, logistics and renovation workflows expose clear inputs and reviewable results.

It brings measurement, time, date and unit conversion, text, developer, image, PDF and file, media, finance and record, engineering and workplace tools into one app. For tasks that need a definite result, there is no need to go through the cloud or a generative service.

V3.0 adds 15 local tools:
- 5 fun tools: Praise Generator, Zen Fish, Bubble Wrap, Clock-Out Countdown and Compatibility Meter
- 5 ID photo tools: ID Photo Background, ID Photo Crop, ID Photo Sheet, ID Photo Check and ID Photo Enhance
- 5 photo restoration tools: Old Photo Restore, Photo Denoise, Photo Deblur, Photo Colorize and Photo Upscale 8K

Photo restoration runs entirely on device, with up to 8K on the long edge. Colorize applies a local color tone; it does not restore true historical colors, and severe blur may not be fully recovered. Photos, PDFs, videos and text never leave the device.

Key features include:
Measurement, timer, date and unit conversion tools
Text utilities, JSON, regex, UUID/ULID, JWT, URL parsing, and Voice to Text
Bill split, unit price comparison, work hours, time zones, date calculation, and exam countdown
Compound interest, deposits, recurring investment, mortgage comparison, ledger, savings and local records
Image compression, format conversion, stitching, color picking, watermark, EXIF, redaction, OCR, QR and barcode tools
PDF and file tools, video compression, and engineering, workplace, logistics and renovation tools
Supports Simplified Chinese, Traditional Chinese, English, Japanese, Korean, Spanish, Brazilian Portuguese, German and French.

Have a feature idea or want a new tool? Tell us in an App Store review.