200 privacy-first tools
that never leave your device.

A.C.U.T.E. Labs builds local browser utilities for PDFs, images, text, developers and UK small businesses. Everything runs in your browser. Nothing is uploaded.

⚙️
200 tools live PDF, image, text, developer & UK business.
🔓
No account needed Open a tool and start immediately.
💳
One-time Pro unlock Optional. No subscriptions.

Focused tools for real work.

Each app does one job properly — in your browser, with no data leaving your device. Free tier on every tool; Pro unlocks are one-time.

PDF & documents

MergePad

Combine PDF files locally. Fast, private, free tier included.

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✂️

SplitPad

Split PDFs into pages or ranges. Download as ZIP or individual files.

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✍️

SignPad

Sign PDFs in the browser. No DocuSign, no upload.

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🗜️

CompressPad

Shrink PDF file size without sending files to a server.

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🔄

RotatePad

Fix page orientation locally. No Adobe subscription.

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🖼

PdfPicPad

Convert PDF pages to JPG images entirely in your browser.

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📝

MdPad

Turn Markdown into a clean PDF. Local preview and export.

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📋

SitePad

Site logbook for trades and visits. Keep records on-device.

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UK business

🧾

InvoicePad

Create and download UK invoices. Built for freelancers and SMEs.

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💷

VatPad

UK VAT calculator — add or remove VAT in seconds.

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🧾

ReceiptPad

Generate simple UK receipts locally for cash and card sales.

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🏠

RentPad

Rent receipts for landlords and tenants. Print-ready PDF.

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🪪

NiPad

UK National Insurance estimate for employees and directors.

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🚗

MilePad

HMRC mileage log helper — rates and running totals on-device.

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🏗

CisPad

CIS deduction estimator for UK subcontractors.

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💼

SalaryPad

UK salary / take-home sketch for planning conversations.

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🏛

StampPad

Stamp Duty Land Tax guide calculator for England & NI.

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📅

HolPad

UK bank holidays at a glance — plan invoices and site days.

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Images

📷

HeicPad

Convert HEIC / HEIF photos to JPG without uploading to the cloud.

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🧹

StripPad

Strip EXIF and metadata from images before you share them.

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📉

ShrinkPad

Compress images for email, web and storage — still local.

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📐

ResizePad

Resize images to exact pixels or percentages in the browser.

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✂️

CropPad

Crop photos with a clear frame — no upload.

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🔁

ConvertPad

Convert between common image formats locally.

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QrPad

Generate QR codes for links and text — download PNG.

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💧

MarkPad

Add a simple watermark before you publish.

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FaviconPad

Build favicon-ready images from a square source.

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Text

🔤

WordPad

Word, character and reading-time counts — private.

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LoremPad

Placeholder copy for layouts and mockups.

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Aa

CasePad

Title, upper, lower, snake and kebab case converters.

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DedupePad

Remove duplicate lines from lists and dumps.

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SortPad

Sort lines A–Z or Z–A without a spreadsheet.

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🔗

SlugPad

URL-safe slugs from titles and product names.

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Developer

{ }

JsonPad

Format, validate and tidy JSON in the browser.

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YamlPad

Pretty-print and check YAML without pasting into a random site.

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🗄

SqlPad

Format SQL queries for readability. Local only.

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.*

RegexPad

Test regular expressions against sample text instantly.

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🔑

PassPad

Generate strong passwords and passphrases on-device.

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64

Base64Pad

Encode and decode Base64 safely offline.

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#

HashPad

SHA and related hashes for checksums and debugging.

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🆔

UuidPad

Generate UUIDs for IDs, tests and migrations.

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🎫

JwtPad

Decode JWT payloads for debugging (verify elsewhere).

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CronPad

Read cron expressions in plain English.

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🎨

ColorPad

Convert hex, RGB and HSL colour values.

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±

DiffPad

Side-by-side text diff for configs and copy.

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%

UrlPad

URL-encode and decode query strings.

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T

TomlPad

Format and sanity-check TOML locally.

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</>

XmlPad

Pretty-print XML without an online pastebin.

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Time & productivity

AgePad

Age from date of birth — private calculator.

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ZonePad

Convert times between timezones locally.

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DateDiffPad

Days between two dates.

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BizDayPad

Business days between dates (UK-aware).

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CountPad

Countdown to a target date.

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PomPad

Simple Pomodoro timer in the browser.

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EpochPad

Unix timestamp ↔ human date.

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WeekPad

ISO week number from any date.

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IsoPad

Parse and inspect ISO-8601 strings.

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StampTimePad

Convert timestamps across formats.

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Units & measures

LengthPad

Length unit converter.

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WeightPad

Weight unit converter.

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TempPad

Celsius ↔ Fahrenheit and more.

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SpeedPad

Speed unit converter.

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DataPad

MB ↔ GB and data-size units.

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AreaPad

Area unit converter.

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VolumePad

Volume unit converter.

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PressPad

Pressure unit converter.

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AnglePad

Degrees ↔ radians.

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TimeUnitPad

Seconds, minutes, hours converter.

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Format & data

CsvPad

View and explore CSV files locally.

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CsvJsonPad

CSV ↔ JSON converter.

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GraphPad

Format GraphQL queries.

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JsonYamlPad

JSON ↔ YAML converter.

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IniPad

Format INI configuration files.

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PropsPad

Format Java properties files.

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EnvPad

Parse and tidy .env files.

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HtmlPad

HTML encode and decode.

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CleanPad

Clean and normalise pasted text.

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Security

PinPad

Generate numeric PINs on-device.

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RandPad

Random string generator.

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BytesPad

Random bytes as hex.

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EntropyPad

Password entropy estimator.

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HashCmpPad

Compare hashes safely.

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HmacPad

HMAC generator for debugging.

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TokenPad

API-style token generator.

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Media & creative

MetroPad

Online metronome.

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BpmPad

Tap tempo BPM counter.

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TonePad

Generate test tones.

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AspectPad

Aspect ratio calculator.

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DpiPad

DPI / print size calculator.

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ScreenPad

Screen size and PPI helper.

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BitratePad

Video bitrate estimator.

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SizePad

File size unit calculator.

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DurationPad

Video duration calculator.

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ResPad

Resolution and scale calculator.

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UK tools+

PostPad

UK postcode format checker.

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SortCodePad

UK sort code validator.

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UtrPad

UK UTR format helper.

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TipsPad

Tip and split-bill calculator.

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Math & numbers

PctPad

Percentage calculator online.

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RatioPad

Ratio simplifier calculator.

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AvgPad

Average calculator online.

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MedianPad

Median calculator online.

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ModePad

Mode calculator statistics.

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StdDevPad

Standard deviation calculator.

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GcdPad

Gcd lcm calculator.

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PrimePad

Prime number checker.

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FibPad

Fibonacci sequence generator.

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SciPad

Scientific notation converter.

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Finance lite

CompoundPad

Compound interest calculator.

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LoanPad

Loan repayment calculator.

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RoiPad

Roi calculator online.

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MarginPad

Profit margin calculator.

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MarkupPad

Markup percentage calculator.

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BreakPad

Break even calculator.

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SplitBillPad

Bill splitter calculator.

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TipSplitPad

Tip splitter calculator.

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InflatePad

Inflation calculator historical.

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CurrencyFmtPad

Currency number formatter.

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Lists & sorting

BulletPad

Bullet list maker online.

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NumberListPad

Numbered list generator.

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IntersectPad

List intersection online.

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UnionPad

Merge unique lists online.

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DiffListPad

List difference finder.

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ShufflePad

Shuffle list randomizer.

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PickPad

Random picker from list.

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RankPad

Rank list reorder.

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ChunkPad

Split list into chunks.

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UniquePad

Unique values from list.

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Strings & text

ReversePad

Reverse text online.

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TruncatePad

Truncate text online.

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PadStrPad

Pad string left right.

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WrapPad

Word wrap text online.

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ExtractPad

Extract emails from text.

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PhoneExtractPad

Extract phone numbers from text.

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RepeatPad

Repeat text generator.

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LevPad

Levenshtein distance calculator.

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TitleCasePad

Smart title case converter.

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InitialsPad

Initials generator from name.

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Encode & decode

Base32Pad

Base32 encode decode.

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HexPad

Hex encode decode text.

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Rot13Pad

Rot13 encoder decoder.

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PunyPad

Punycode converter domain.

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UnicodePad

Unicode escape converter.

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AsciiPad

Ascii code converter.

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MorsePad

Morse code translator.

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BinaryPad

Text to binary converter.

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UrlSafePad

Url safe base64 encode.

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QuotedPad

Quoted printable decode.

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JSON & data

JsonPathPad

Json path evaluator online.

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JsonFlatPad

Flatten json online.

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JsonDiffPad

Json diff tool online.

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JsonMinPad

Json minify online.

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JsonPrettyPad

Json prettify online.

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JsonToCsvPad

Json to csv converter.

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JsonSchemaPad

Json schema validator.

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JsonMergePad

Merge json objects online.

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JsonQueryPad

Filter json array online.

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JsonSortPad

Sort json keys alphabetically.

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Markdown

MdPreviewPad

Markdown preview online.

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MdTablePad

Markdown table generator.

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MdTocPad

Markdown table of contents.

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MdCheckPad

Markdown checklist generator.

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MdLinkPad

Markdown link converter.

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MdEscapePad

Escape markdown characters.

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MdWordPad

Markdown word count.

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MdSlidePad

Markdown presentation outline.

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MdFootPad

Markdown footnote helper.

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MdBadgePad

Markdown badge generator.

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Tables & CSV

CsvCleanPad

Clean csv online.

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CsvMergePad

Merge csv files online.

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CsvSplitPad

Split csv by column.

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CsvTransPad

Transpose csv online.

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CsvFilterPad

Filter csv rows online.

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CsvStatsPad

Csv column statistics.

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TsvPad

Tsv to csv converter.

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MdFromCsvPad

Csv to markdown table.

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PivotLitePad

Simple pivot table online.

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SheetDiffPad

Compare two csv sheets.

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Colour

PalettePad

Color palette generator.

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ContrastPad

Wcag contrast checker.

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GradientPad

Css gradient generator.

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HslMixPad

Hsl color mixer.

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TintPad

Color tint shade generator.

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BlindPad

Colorblind simulator.

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NameColorPad

Hex to color name.

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TailwindPad

Tailwind color finder.

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RampPad

Color ramp generator.

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OpaPad

Hex opacity calculator.

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Design & CSS

RemPad

Px to rem converter.

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EmPad

Px to em converter.

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TypeScalePad

Modular type scale generator.

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SpacePad

Spacing scale generator.

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GoldenPad

Golden ratio calculator.

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GridPad

Css grid generator.

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FlexPad

Flexbox cheatsheet interactive.

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ShadowPad

Css box shadow generator.

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RadiusPad

Border radius generator.

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ClampPad

Css clamp calculator.

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Privacy

🔐

PhrasePad

Memorable passphrases generated on your device.

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💪

StrongPad

Password strength feedback before you reuse a weak one.

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Private by design. No exceptions.

Every tool is built the same way — your files never leave your machine.

01

Open a tool

No account, no install. Open any of the 200 tools in a modern browser.

02

Add your files

Drag and drop or pick files. They load into browser memory only.

03

Process locally

All work happens on your device. Open DevTools — no file uploads.

04

Download the result

Your file downloads directly. Nothing is stored or retained.

Ready to try the catalogue?

Free tier on every tool. Unlock Pro or a pack once — no subscription, ever.