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Cach Giam Kich Thuoc Tep Zip Online (Mien Phi)

Cap nhat lan cuoi 2026-04-27. Moi buoc duoi day chay trong trinh duyet cua ban; tep zip khong bao gio tai len may chu. Da kiem tra voi gioi han 25 MB ma Gmail, Outlook va Yahoo ap dung cho tep dinh kem.

Cau tra loi trong 30 giay. Hau het cac truong hop "tep zip qua lon" do ba thu gay ra: (1) zip chua anh / video / PDF da duoc nen, vi vay DEFLATE khong co gi de cho; (2) cac tep nguon o dinh dang sai (anh PNG, HEIC, BMP, TIFF, WAV); (3) zip don gian dong goi qua nhieu - dong tac dung la chia no ra. Ba chien thuat theo thu tu cat giam kich thuoc: chuyen doi cac tep nang truoc (PNG sang JPG, HEIC sang JPG), nen lai khong co media neu tai lieu la cai can di chuyen, hoac chia zip thanh cac phan vua voi gioi han tai len cua ban. Huong dan chi tiet ben duoi.

Vi sao zip cua ban lon hon mong doi

Nen ZIP su dung mot thuat toan goi la DEFLATE. No hoat dong bang cach tim cac mau byte lap lai trong dau vao va thay the chung bang ma ngan hon. Dieu do hoat dong xuat sac tren tep van ban, ma nguon, CSV va DOCX (cat 50-80% kich thuoc) vi van ban co rat nhieu lap lai. No gan nhu khong lam gi tren JPG, PNG, HEIC, MP3, MP4 hoac PDF hien dai vi cac dinh dang do da duoc nen - cac byte gan nhu ngau nhien, vi vay khong co mau cho DEFLATE tim. Mot zip cua 100 JPG iPhone thuong nho hon 1-3% so voi cac anh roi le. Mot zip cua 100 tep ma nguon thuong nho hon 70-80%.

Chan doan truong hop cua ban trong 10 giay. Mo zip, xem ben trong co gi. Neu chu yeu la anh / video / PDF / am thanh, ZIP khong the giup them nua - ban phai tan cong cac tep nguon (Chien thuat A). Neu chu yeu la tai lieu, ma nguon hoac bang tinh nhung zip van vuot gioi han, zip don gian la qua lon cho mot tep dinh kem (Chien thuat C). Truong hop hon hop - mot it tai lieu va mot it anh - duoc giai quyet bang Chien thuat B.

Chien thuat A - chuyen doi cac tep nang truoc khi zip

Day la chien thuat cho cat giam kich thuoc lon nhat, voi khoang cach lon. Chuyen doi dinh dang co the thu nho zip 70-95% ma khong can nen lai bat ky thu gi. Ba truong hop pho bien:

Anh PNG trong zip. PNG la dinh dang khong mat mat danh cho anh chup man hinh va do hoa. Anh chup PNG lon hon 5-10 lan so voi cung anh dang JPG o chat luong 85. Chay tung anh PNG qua Compress Image voi dau ra JPG, luu chung, sau do nen lai. Mot zip 200 MB anh PNG thuong xuong con 25-40 MB sau buoc nay.
Anh HEIC tu iPhone. HEIC da nho nhung khong mo duoc tren Windows / Android cu / hau het cac trinh duyet. Chuyen doi sang JPG qua HEIC to JPG - cac ban sao JPG co kich thuoc tuong tu, nhung nguoi nhan thuc su co the dung chung. De xu ly lo, xem cach chuyen doi 100 anh HEIC sang JPG.
BMP / TIFF / RAW. Ca ba lon hon 5-10 lan so voi JPG tuong duong. Neu zip chua bat ky cai nao, chuyen sang JPG truoc.

Sau khi chuyen doi, xoa cac ban goc khoi thu muc va nen lai. Zip moi se la mot phan nho cua kich thuoc goc va nguoi nhan se khong can phan mem dac biet nao de mo noi dung.

Chien thuat B - nen lai khong co media

Neu zip mot phan la tai lieu va mot phan la media, hay hoi xem nguoi nhan co thuc su can ca hai khong. Tai lieu la phan nho cua zip nhung thuong la phan nguoi nhan quan tam. Anh va video co the di kem qua mot lien ket truyen tep (Drive, Dropbox, WeTransfer) trong khi tai lieu di nhu tep dinh kem email.

Tung buoc: mo thu muc goc, keo chi cac tai lieu vao Zip File, tai zip nho ve. Tai anh / video len mot dich vu truyen tep trong mot chia se rieng. Gui email kem zip nho + lien ket chia se. Nguoi nhan co tat ca; tep dinh kem email o duoi 25 MB.

Chien thuat C - chia zip thanh cac phan

Neu ban khong the bo bat ky noi dung nao va khong the dung lien ket truyen tep (mot so nguoi nhan chan dich vu chia se tep ben ngoai), chia la cau tra loi. Lay thu muc nguon, chia thanh nua hoac mot phan ba, va zip moi phan rieng le. Nguoi nhan giai nen moi zip vao mot thu muc chung va nhan duoc cau truc goc tro lai.

Tung buoc: mo thu muc goc, chia thu cong thanh cac thu muc con part-1, part-2, part-3 sao cho moi cai duoi ngan sach kich thuoc cua ban (dung 20 MB de chua khoang trong cho overhead email, khong phai 25 MB). ZIP moi thu muc con rieng le qua Zip File. Gui moi cai nhu mot email rieng hoac dinh kem ca ba vao mot email neu tong duoi gioi han ket hop cua nha cung cap.

Chien thuat D - giam kich thuoc tep zip xuong 25 MB online mien phi

Bien the tim kiem pho bien nhat la "giam kich thuoc tep zip xuong 25 MB online mien phi" - so 25 MB la gioi han tep dinh kem cua Gmail. Duong nhanh nhat den muc tieu cu the do:

Mo zip hien tai va kiem tra cac muc lon nhat theo kich thuoc. Hau het cac trinh quan ly ZIP (Windows Explorer, macOS Finder) sap xep noi dung theo kich thuoc.
Voi moi PNG / HEIC / BMP / TIFF o dau danh sach, chay Chien thuat A (chuyen doi dinh dang).
Nen lai thu muc. Neu ket qua bay gio duoi 25 MB, ban da xong.
Neu khong, bo muc don le lon nhat khoi zip va dat no vao mot lien ket truyen tep. Zip nho hon + lien ket chia se van giao tat ca.

Cach nay hoat dong trong ~80% truong hop "zip cua toi chi qua 25 MB mot chut". 20% con lai can chia Chien thuat C vi noi dung thuc su khong the giam them.

Cai gi KHONG giam kich thuoc zip

Ba thu tuong nhu nen giup nhung khong:

Nen lai zip hien tai. Mot zip-cua-zip co cung kich thuoc voi zip ben trong. DEFLATE khong the ep noi dung da DEFLATE-ed. Nen lai luon lang phi thoi gian.
Chuyen tu ZIP sang RAR hoac 7z. 7z va RAR su dung thuat toan chat hon mot chut so voi ZIP (LZMA / LZMA2 vs DEFLATE), nhung loi tren media da nen van ~0%. Loi tren zip nang van ban la 5-15%, hiem khi du de vuot qua gioi han email. Hon nua nguoi nhan cua ban co the khong co phan mem mo RAR / 7z. ZIP vs 7z vs RAR noi ve khi nao chuyen doi dinh dang dang gia.
Dat "nen toi da" trong cong cu zip. Hau het cong cu ZIP mac dinh la muc DEFLATE 6 ("binh thuong"). Chuyen sang muc 9 ("toi da") cho 1-3% cat them tren zip nang van ban va 0% tren media. Khong dang thoi gian tru khi luu tru ma nguon rat lon.

Tom tat quyet dinh

Mo zip, xem ben trong co gi. Neu anh / video chiem uu the: Chien thuat A (chuyen doi dinh dang truoc). Neu ban chi can gui tai lieu: Chien thuat B (chi nen lai docs, lien ket truyen tep cho media). Neu moi thu phai di nhu zip: Chien thuat C (chia thanh phan 20 MB). Voi muc tieu cu the "giam xuong 25 MB", chay Chien thuat A roi kiem tra kich thuoc; cai do giai quyet 80% truong hop.

Doc lien quan: cach nen thu muc cho email bao tru cau hoi thuong nguon "toi co mot thu muc, duong di zip nen dung gi". Trinh nen tep vs ZIP bao tru khi nao ZIP hoan toan sai cong cu.

Quyen rieng tu

Moi cong cu duoc lien ket trong huong dan nay chay trong trinh duyet cua ban tren thiet bi cua ban. Tep zip ban dang thu nho, va bat ky tep nao ben trong, khong bao gio duoc tai len may chu. Dieu nay quan trong khi noi dung bao gom mau HR, tai lieu thue, hop dong, ho so y te, hoac ma nguon duoi NDA. Ve loai rong hon, xem cong cu truc tuyen mien phi hoat dong khong tai len tep.

Last updated: May 31, 2026

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