All LeedyBox Tools

Need	Tool	Why
A different image format	Image Converter	Change PNG, JPG, WebP and other formats; transparent areas become white in JPG.
Smaller image dimensions	Image Resizer	Resize many images by pixels or percentage; the aspect ratio is kept by default and small images are not enlarged.
A smaller image file or a maximum file size	Image Compressor	Use a quality setting or a target size in KB, compare before and after, and keep the original when the result is not smaller.
Only part of an image	Crop Image	Drag a crop box or enter exact pixels, with fixed aspect ratios such as 1:1 or 16:9.
A sideways or mirrored photo fixed	Rotate & Flip Image	Rotate by 90°, 180° or any angle and flip horizontally or vertically, for one or many images.
Location and camera data removed before sharing	Remove EXIF Data	Shows and removes EXIF, GPS, XMP and IPTC metadata without re-compressing the image.
Text from a photo or screenshot	Image to Text (OCR)	Recognises text in JPG, PNG and WebP images in your browser; check the result for errors.
Icons for a website	Favicon Generator	Creates favicon.ico, PNG icons, an Apple touch icon, a manifest and the HTML tags from one image or a few letters.
A passport, visa or ID photo in a set size	ID Photo Maker	Fits the face to sizes such as 35 × 45 mm or 2 × 2 in with head guides, checks the photo and saves a 300 dpi JPG or a print sheet with cut lines.
An image of a PDF page	PDF to JPG	Render PDF pages as JPG or PNG files.
One PDF from several images	JPG to PDF	Arrange images as pages and choose page size and margins.
One document from several PDFs	Merge PDF	Combine files in a chosen order without re-rendering pages.
Only some pages of a PDF	Split PDF	Extract page ranges or save every page separately.
A smaller scanned PDF	Compress PDF	Re-render pages as compressed images; best for scans and photos.
Text from a PDF	PDF to Text	Extract the text layer, with OCR for scanned pages.
PDF pages in a different order, or some removed	Organize PDF	Reorder, rotate, delete, duplicate or insert pages using thumbnails; page content is copied unchanged.
Sideways or upside-down PDF pages fixed	Rotate PDF	Changes only each page's rotation setting, so text stays selectable.
A PDF marked as a draft or confidential	Add Watermark to PDF	Add a text or image watermark with your choice of opacity, angle and position, or tiled across the page.
Numbered PDF pages	Add Page Numbers	Choose the position, a format such as "Page 1 of 10", Roman numerals and the start number.
JSON as CSV, YAML, SQL or XML	Data Converter	Convert and validate structured data, with line numbers and error positions.
Decode Base64, a URL or a JWT	Base64 / URL / JWT	Encode or decode values and inspect JWT headers and payloads; it does not verify signatures.
Understand a cron schedule	Cron Parser	Read Unix, Spring, Quartz and AWS expressions and list the next run times.
Test a regular expression	RegEx Tester	Highlight matches and capture groups and preview replacements.
A checksum for a download or a text	Hash Generator	Compute MD5, SHA-1 or SHA-2 hashes and HMAC, and compare with an expected value.
A random password or UUID	Password & UUID Generator	Uses the browser's cryptographic random generator; UUID v4 or time-ordered v7.
A Unix timestamp as a date, or a date as a timestamp	Unix Timestamp Converter	Handles seconds, milliseconds, microseconds and nanoseconds and any time zone, with notes on daylight saving changes.
The letter of a Spanish DNI or NIE	DNI, NIE & NIF Validator	Calculates and checks the control letter with the Ministerio del Interior's table; recognises K, L, M and company NIFs.
Check a Turkish identity number	TC Kimlik No Validator	Checks the 10th and 11th digits with the formula in public use; NVİ does not publish its algorithm.
Check a Russian ИНН or СНИЛС	INN & SNILS Validator	Checks 10- and 12-digit ИНН and the СНИЛС check number, and writes a СНИЛС as 000-000-000 00.
Check a Brazilian CPF or CNPJ	CPF and CNPJ Validator	Checks the check digits of a CPF and of numeric and alphanumeric CNPJs (from July 2026), and shows the CPF fiscal region.
Check an IBAN	IBAN Validator	Checks length, country format and MOD 97 check digits against the SWIFT IBAN Registry (89 countries); national check digits are not checked.
Calculate or decode an Italian codice fiscale	Codice Fiscale Calculator	Calculates the code from name, date and place of birth, decodes and checks a code, and handles omocodia; place codes from the ANPR tables.
A word or character count	Word & Character Counter	Counts words and characters with the browser's built-in text segmentation.
Different letter case for names or keys	Case Converter	Convert lines or JSON keys between camelCase, snake_case, kebab-case and more.
The changes between two texts	Text Diff	Compare line by line with added and removed lines highlighted.
Placeholder text for a layout	Lorem Ipsum Generator	Generate filler text in Latin, Korean, Japanese or Chinese.
An amount in words for a check, invoice or contract	Number to Words	Writes amounts the way each country does: … and 56/100 dollars, 人民币大写, сумма прописью and more, without rounding.
Full-width ＡＢＣ１２３ or ｶﾀｶﾅ in normal width	Full-Width ↔ Half-Width	Converts by the Unicode pairs and joins ｶﾞ into ガ; also hiragana ↔ katakana.
Vietnamese text or names without accents	Remove Vietnamese Accents	Removes all marks or only the five tone marks; capitals for forms and a slug per line.
A URL slug, or text without accents	Slug Generator	Folds ç, ğ, ı, ş, ä → ae, ß → ss and more by the ICAO passport table and writes Russian in Latin letters; keeps or drops other scripts.
A Korean name in English letters	Korean Name Romanization	Follows the official rules syllable by syllable, offers Kim, Lee or Park for the surname and shows passport statistics per syllable.
Russian names or text in Latin letters	Cyrillic to Latin	ICAO Doc 9303 (Юлия → Iuliia) or BGN/PCGN (Yuliya); lists letters that are not Russian.
Simplified Chinese in Traditional characters (or back)	Simplified ↔ Traditional Chinese	Taiwan, Hong Kong or OpenCC forms, optional regional words (软件 → 軟體); dictionaries load from leedybox.com.
A recording or video as text or subtitles	Audio to Text	Whisper base or small in the browser, 99 languages, TXT, SRT and VTT; the model loads from leedybox.com.
A Western date in Japanese era names (or back)	Japanese Era Converter	Exact era start dates (Heisei from 8 January 1989), 元年, zodiac year and an age chart.
A Thai Buddhist Era date in the Western calendar (or back)	Thai Buddhist Year Converter	B.E. = A.D. + 543, with the old 1 April new year before 1941 and the nine-month year 2483.
A lunar date (Chinese, Korean, Vietnamese) in the Gregorian calendar, or back	Lunar Calendar Converter	Korean dates from KASI, Chinese from the Hong Kong Observatory, Vietnamese for UTC+7; shows where the three differ.
VAT added to a net price, or taken out of a gross price	VAT Calculator	Rates of the UK and 15 more countries by date, several invoice lines, and the rounding rules invoices use.
Korean age (만 나이, year age, counting age) from a birth date	Korean Age Calculator	Follows the 2023 rule (Civil Act art. 158); also year age for the laws that still use it and lunar birthdays.
A percentage, a percent change or a price before or after a discount	Percentage Calculator	Seven common percentage questions, calculated exactly and rounded only when shown.
The monthly payment and schedule of a loan or mortgage	Loan Calculator	Equal payments, equal principal, interest only or flat rate, with Canadian and EU APR rate conventions.
How savings grow with compound interest and regular deposits	Compound Interest Calculator	Daily to yearly compounding, deposits at the start or end of each period, compared with simple interest.
Your BMI and weight class, under the WHO or an Asian standard	BMI Calculator	Every standard on every page: WHO/CDC, UK NICE, Korea, Japan, China, Indonesia, Thailand.
Your BMR and how many calories you need a day	Calorie Calculator	Six methods, including Japan’s DRI 2025 and Korea’s KDRIs 2025, with their activity levels.
An exact age in years, months and days	Age Calculator	Choose how 29 February birthdays count; optional Japanese legal age day.
A QR code or a product barcode	QR & Barcode Generator	Create codes for links, text or Wi-Fi details; test them before printing.

Frequently Asked Questions

Which tool reduces a PDF size?

Use Compress PDF. It works best for scanned or image-heavy PDFs; text-based PDFs may not get smaller.

Which tool extracts text?

Use PDF to Text. Pages without a text layer, such as scans, are read with OCR.

Which tool makes an image file smaller?

Use Image Compressor to lower the quality or reach a target file size, and Image Resizer if the image is larger than it needs to be.

Can I convert images to PDF?

Yes. Use JPG to PDF, which also accepts PNG and WebP images.

Where did the case converter, regex tester and other utilities go?

They used to be tabs on the Data Tools page and now each has its own page under Developer Tools or Text Tools. Old links to those tabs redirect to the new pages.

All LeedyBox Tools

Developer Tools

Number Validators

Text Tools

Text editing

Language & script converters

Speech & subtitles

Date Tools

Calculators

Image Tools

PDF Tools

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Frequently Asked Questions