Plain notes from Toolcore: everyday browser tools, careful assistant workflows, time-zone habits, and small checks that keep boring mistakes from becoming real work.
Start with the problem you recognize. If you want a practical tool, follow the related links at the bottom of each article. If a post talks about AI or agents, read it as a human guide to limits and habits, not as a trend report or a replacement for your own judgment.
2026-09-03
GSC median clicks striking distance, B6 pixels X header, PDF rotate 45 set title, tetradic split-complementary palettes, fiscal quarter Oct UPC-A check, Accept-Language CSP parsers, Base32 hex encode, FNV-1a CRC-32 hash demo—100 browser-local tools map.
2026-09-02
GSC min clicks CTR rank, A7 pixels LinkedIn banner, PDF rotate 270 set creator, tetradic analogous palettes, fiscal quarter Jul EAN-13 format, Accept-Language Cache-Control parsers, Base32 hex encode, Jenkins CRC-16 hash demo—100 browser-local tools map.
2026-09-02
GSC sum clicks export JSON, A6 pixels YouTube thumbnail, PDF rotate 180 set author, complementary square palettes, fiscal quarter Apr UPC-A check, Accept CSP HSTS parsers, Base64 URL encode, FNV-1a CRC-32 hash demo—100 browser-local tools map.
2026-09-02
GSC row count click rank, A5 pixels TikTok video, PDF rotate 90 set title, triadic split-complementary palettes, fiscal quarter Jan EAN-13 check, Content-Type Cache-Control parsers, Base32 hex encode, FNV-1 SDBM hash demo—100 browser-local tools map.
2026-09-02
GSC average position click share, C6 pixels YouTube banners, PDF rotate 180 set title, tetradic complementary palettes, fiscal quarter Oct UPC check, Accept HSTS parsers, Base64 Morse encode, FNV-1a CRC-32 hash demo—100 browser-local tools map.
2026-09-02
GSC max position export TSV, B5 pixels X headers, PDF rotate 90 set title, triadic split-complementary palettes, fiscal quarter EAN-13 check, Cache-Control Authorization parsers, Base32 ROT47 encode, SDBM Adler-32 hash demo—100 browser-local tools map.
2026-09-02
GSC min position impression share, A6 pixels Facebook covers, PDF rotate 270 set title, double-complementary square palettes, calendar quarter UPC-A check, Accept-Language Forwarded parsers, Base85 quoted-printable encode, AP Hsieh hash demo—100 browser-local tools map.
2026-09-02
GSC mode position click share, C5 pixels LinkedIn banners, PDF rotate 90 set keywords, split-complementary analogous palettes, ISO week EAN-13 check, Accept HSTS parsers, Base32 ROT47 encode, Jenkins FNV-1 demo—100 browser-local tools map.
2026-09-02
GSC median position CTR calculator, B4 pixels YouTube thumbnails, PDF rotate 180 set author, tetradic complementary palettes, calendar quarter UPC check, Content-Type CSP parsers, Base64url Morse encode, SDBM FNV-1a demo—100 browser-local tools map.
2026-09-01
GSC click min JSON export, A3 pixels Pinterest sizes, PDF rotate 270 set title, analogous split-complementary palettes, fiscal quarter EAN-13 check, Accept Authorization parsers, Base32 ROT47 encode, Jenkins Adler-32 demo—100 browser-local tools map.
2026-09-01
GSC click min JSON export, A3 pixels Pinterest sizes, PDF rotate 270 set title, analogous split-complementary palettes, fiscal quarter EAN-13 check, Accept Authorization parsers, Base32 ROT47 encode, Jenkins Adler-32 demo—100 browser-local tools map.
2026-09-01
GSC click max impression rank TSV export, B5 pixels Instagram sizes, PDF rotate 90 set author, triadic complementary palettes, calendar quarter UPC check, Cache-Control CSP parsers, Base64url Morse encode, FNV-1a Fletcher-32 demo—100 browser-local tools map.
2026-09-01
GSC click median CTR rank JSON export, A5 pixels Pinterest sizes, PDF rotate 270 set creator, analogous monochromatic palettes, fiscal quarter EAN-13 check, Accept HSTS parsers, Base64 encode ROT47, Jenkins hash Luhn demo—100 browser-local tools map.
2026-09-01
GSC average CTR top-N impressions TSV export, A4 pixels Instagram sizes, PDF rotate 180 set author, triadic complementary palettes, calendar quarter UPC check, Cache-Control CSP parsers, URL component encode ROT13, FNV-1a Adler-32 demos—100 browser-local tools map.
2026-09-01
GSC impression rank CTR share, US Letter pixels banner sizes, PDF rotate 90 keywords metadata, split-complementary monochromatic palettes, fiscal year GTIN-14, Accept-Language HSTS parsers, Base64 XML escape, MurmurHash Fletcher-32 demos—100 browser-local tools map.
2026-09-01
GSC min-clicks and weighted position, A4 pixels print bleed, PDF rotate 180 author metadata, complementary tetradic palettes, date math EAN-13, header parsers Base64URL, FNV-1a CRC-32C demos—100 browser-local tools map.
2026-08-31
GSC impression share striking distance, media megapixel OG size, PDF keywords rotate 270, triadic palette WCAG AA, fiscal quarter ISBN-13, Cache-Control Morse CRC-32—100 browser-local tools map.
2026-08-31
GSC query share and CTR rank, media letter pixels video bitrate, PDF rotate 180 metadata sets, contrast ratio complementary, week number IBAN format, Accept parse URL encode FNV-1a—100 browser-local tools map.
2026-08-31
GSC query rank and CTR threshold, media PPI megapixels, PDF rotate metadata, hex RGB WCAG AA, fiscal year weekday count, VIN ISBN format, header parsers, CRC8 checksum—100 browser-local tools map.
2026-08-31
GSC position median and brand filter, media GIF and bitrate math, PDF title metadata, color saturate WCAG AAA, Julian date, LEI IBAN format, header parsers, and FNV hash—100 browser-local tools map.
2026-08-31
GSC rank change and export JSON, media retina math, PDF rotate and metadata, color contrast palettes, schedule fiscal year, identity VIN checksum, and header parsers—100 browser-local tools map.
2026-08-31
GSC CTR and query helpers, media pixel math, PDF metadata tools, OKLCH palettes, schedule date math, identity format checks, and header parsers—100 browser-local tools map.
2026-08-31
Dice and spin wheels, PDF metadata and page dimensions, OKLCH palettes, pixel math, tracking format checks, and header parsers—100 browser-local tools map.
2026-08-31
Wilson intervals, chi-square lite, Spearman ρ, modular arithmetic, trig, GPA, and finance calculators—browser-local Math tab map.
2026-08-31
Jaccard and Sørensen–Dice similarity, readability indices, line transforms, extractors, and Markdown helpers—Writing tab map.
2026-08-31
curl parse, HTTP fetch, Forwarded and Retry-After header parsers, SSL expiry hint, CIDR, and status reference—Protocol tab map.
2026-08-31
IMSI/MEI/RTAC format checks, GTIN and GLN validators, UUID validate, ISRC/ISSN, and supply-chain ids—Identity tab map.
2026-08-31
TSV/CSV/NDJSON export, anti-join and cross join, IQR field stats, pad/skip rows, pick/rename keys—JSON hub map.
2026-08-31
Prompt section audits, JSON shape checks, guardrail pattern scans, RAG chunk packing, and local eval metrics—100 browser-only AI workflow helpers.
2026-08-31
MCP manifest sizing, memory budgets, retrieval keyword stats, i18n script mix, compliance pattern scans, and SSE stream metrics—100 browser-only AI workflow helpers.
2026-08-31
Embedding storage, JSONL fine-tune stats, eval overlap, multimodal bytes, RPM/TPM planners, and prompt template overhead—100 browser-only AI workflow helpers.
2026-08-31
Token stats, RAG chunk math, cost estimates, text prep, chat formats, and payload size—100 new client-side AI workflow helpers with no API calls.
2026-08-31
Browser-only helpers for token estimates, context window fit, messages JSON breakdown, chat turn share, whitespace savings, and API cost math—no model calls.
2026-08-30
Partial eta-squared and Brier score, Pig Latin, SHA-384 demo, Retry-After parse, NPI format—map for 100 new tools (20 with extra SEO body).
2026-08-30
Wilson score interval and BLAKE2b demo, Forwarded header parse, Flesch reading ease, fiscal quarter, SSN format—map for 100 new tools (20 with extra SEO body).
2026-08-30
Fisher exact and SHA3-256 demo, Playfair and Soundex, Accept header parse, Easter date, VIN format—map for 100 new tools (20 with extra SEO body).
2026-08-30
Proportion z-test and SHA-256 demo, affine cipher, HTTP status line parse, EAN check digit—map for 100 new tools (20 with extra SEO body).
2026-08-30
Chi-square and t-test lite, Morse encode and Flesch reading ease, SHA-1 demo, ETag parse, Julian day, and IBAN mod97—map for 100 new tools.
2026-08-30
ANOVA and Kruskal-Wallis, Vigenère and bifid cipher, SRI hash and PKCS7 padding, Crockford Base32, Authorization parse, quarter-end date, and SEDOL check digit—map for 100 new tools.
2026-08-30
Mann-Whitney U and moving average, Hill cipher and pangram check, HMAC-SHA384 demo, DNS SOA parse, Excel serial date, and ISIN check digit—map for 100 new tools.
2026-08-30
Spearman ρ and compound interest, tap code and SMOG index, JWT header decode, Gray code, SPF/DMARC parse, ISO week, and UPC-A check digit—map for 100 new tools.
2026-08-30
Sample mean and z-score, text bigram frequency, SHA3-224 and HMAC-SHA256, Base62 encode, HTTP Accept parse, fiscal quarter, and ISBN-13 check digit—map for 100 new tools.
2026-08-29
72 new pages beside Search Console winners: ICCID/IMO neighbors, barcode validators, Z85 encoding siblings, JSON export/join, Jaccard-style similarity, HTTP fetch helpers.
2026-08-28
Ideal gas and pH math, readability and case tools, SHAKE and HMAC hashes, Base64url split pages, COOP/COEP parse, date countdowns, and NSN/GLN format checks—map for 100 new tools.
2026-08-28
Surface area and Ohm's law, Morse and cipher decode, SHA-512 and Base58, HTTP/DNS header parsers, WCAG contrast, and video bitrate estimates—map for 100 new tools.
2026-08-27
Mortgage and ROI math, case and similarity tools, SHA3 and JSON escape, HTTP/SPF/DMARC parsers, business-day dates, and UPC/EAN checks—map for 100 new browser-local pages.
2026-08-26
SSH fingerprints, ISRC and SWIFT validation, OKLCH and Lab to hex, WCAG luminance, megapixels, print size, and SVG viewBox—browser-local checks across four categories.
2026-08-26
A task-first map of new geometry, finance, readability indices, IEEE-754, business-day math, cron previews, and URL helpers—without scanning the whole Math tab.
2026-08-25
When a snippet lands from chat or docs: validate UUIDs and XML, format YAML, parse curl, derive PBKDF2, preview HTML, generate test rows, estimate GPA, or run a Pomodoro.
2026-08-06
Why AI hype and privacy headlines are pushing people back to focused browser tools for JSON, timestamps, favicons, and other exact work—and how to split generative help from checkable utilities.
2026-08-04
Look up favicon dimensions, check your logo, export 512×512 for WordPress Site Icon, understand .ico layers, or generate a full PNG set in the browser.
2026-07-05
A browser-first workflow for image conversion, resizing, cropping, rotation, favicons, palettes, QR codes, barcodes, and publish-ready assets.
2026-07-04
How to choose between CSS color conversion, palettes, shades, WCAG contrast, accessible pair suggestions, design tokens, and web-safe swatches.
2026-07-03
Use browser-first helpers for redaction, paste scanning, token estimates, RAG chunk planning, prompt checks, and output comparison before sending text elsewhere.
2026-07-02
Choose between random UUIDs, time-ordered UUID v7, sortable ULIDs, MongoDB ObjectIds, Nano IDs, and random strings without confusing IDs with secrets.
2026-07-01
A practical map for Unix timestamps, ISO durations, cron previews, countdowns, stopwatches, date helpers, and time zone checks.
2026-06-29
A task-first map for choosing Merge PDF, Split PDF, Reorder PDF, PDF to image, Extract text, PDF info, and other browser PDF tools.
2026-06-28
How to choose the right local security check for JWTs, hashes, HMAC, PEM blocks, file checksums, PKCE, TOTP, payment identifiers, and random tokens.
2026-06-27
A practical map for HTTP status codes, headers, MIME types, CIDR, IPv6, User-Agent strings, Open Graph previews, robots, sitemap, SemVer, slugs, and SQL formatting.
2026-06-26
Use browser text tools for removing empty lines, deduping, sorting, CSV and TSV conversion, extracting URLs or emails, regex testing, Markdown preview, and word counts.
2026-06-25
A plain guide to unit converters, data-size tools, one-way conversions, sales tax, tips, discounts, loan payments, compound interest, dates, and quick estimates.
2026-06-09
Task-first links for image conversion, resize, compression, cleanup, palette extraction, contrast checks, CSS colors, QR codes, and barcodes.
2026-06-05
Symptom-first links for Base64, URL encoding, Base64url, JWT, hex, HTML entities, Punycode, and when to open crypto instead of an encoder.
2026-06-05
Task-first links for formatting, comparing, converting YAML or CSV, validating schemas, and generating TypeScript or other code—when the JSON hub grid feels too large to scan.
2026-06-02
Why assistants should hand exact work to browser tool pages: format, encode, diff, count, and inspect with prefilled links instead of spending model context.
2026-06-01
A workflow tour of recent pages for messy pasted text, deeper JSON cleanup, YAML↔TOML conversion, network helpers, PDF work, and quick media edits.
2026-05-20
A plain site guide: find tools from home, search, or All; run them with Load example; read Client/Server/AI labels; optionally sign in for favorites and a custom home.
2026-04-29
Anchor on UTC, write times in ISO 8601, watch out for DST and seconds-vs-millis—plus three browser tabs (Unix timestamp, time zone converter, ISO 8601 duration) that handle most of the headaches at work.
2026-04-27
Why generated output can feel like progress before it is checked, and how small browser tools keep review close to the work.
2026-04-26
Quick checks, reliable one-off tools, and clear run labels for people who want to finish small tasks without making a whole project out of them.
2026-04-25
Why assistants handle the easy parts well, why review and mentoring still matter, and where checkable tools fit in.
2026-04-24
How browser-local utilities stay central, when server-side helpers apply, and how agents integrate without replacing checkable work.